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121143631 = 726174007
BaseRepresentation
bin1110011100010…
…00000101001111
322102221201211011
413032020011033
5222003044011
620004310051
73000463300
oct716100517
9272851734
10121143631
1162423004
12346a2327
131c13762b
14121367a7
15a97e621
hex738814f

121143631 has 12 divisors (see below), whose sum is σ = 141185808. Its totient is φ = 103643232.

The previous prime is 121143623. The next prime is 121143641. The reversal of 121143631 is 136341121.

It is not a de Polignac number, because 121143631 - 23 = 121143623 is a prime.

It is a super-3 number, since 3×1211436313 (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28230 + ... + 32236.

It is an arithmetic number, because the mean of its divisors is an integer number (11765484).

Almost surely, 2121143631 is an apocalyptic number.

121143631 is a deficient number, since it is larger than the sum of its proper divisors (20042177).

121143631 is an equidigital number, since it uses as much as digits as its factorization.

121143631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638 (or 4631 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 121143631 is about 11006.5267455269. The cubic root of 121143631 is about 494.8043725829.

Adding to 121143631 its reverse (136341121), we get a palindrome (257484752).

The spelling of 121143631 in words is "one hundred twenty-one million, one hundred forty-three thousand, six hundred thirty-one".

Divisors: 1 7 49 617 4007 4319 28049 30233 196343 2472319 17306233 121143631