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121312272 = 24317148667
BaseRepresentation
bin1110011101100…
…01010000010000
322110021022011010
413032301100100
5222023443042
620012050520
73002065044
oct716612020
9273238133
10121312272
1162528784
1234763a40
131c196313
141217c024
15a9b459c
hex73b1410

121312272 has 40 divisors (see below), whose sum is σ = 331826976. Its totient is φ = 38058496.

The previous prime is 121312253. The next prime is 121312291. The reversal of 121312272 is 272213121.

It is an interprime number because it is at equal distance from previous prime (121312253) and next prime (121312291).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73518 + ... + 75149.

Almost surely, 2121312272 is an apocalyptic number.

121312272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121312272 is an abundant number, since it is smaller than the sum of its proper divisors (210514704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121312272 is a wasteful number, since it uses less digits than its factorization.

121312272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148695 (or 148689 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 121312272 is about 11014.1850356710. The cubic root of 121312272 is about 495.0338676960.

Adding to 121312272 its reverse (272213121), we get a palindrome (393525393).

The spelling of 121312272 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred seventy-two".

Divisors: 1 2 3 4 6 8 12 16 17 24 34 48 51 68 102 136 204 272 408 816 148667 297334 446001 594668 892002 1189336 1784004 2378672 2527339 3568008 5054678 7136016 7582017 10109356 15164034 20218712 30328068 40437424 60656136 121312272