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131121212 = 2232780303
BaseRepresentation
bin1111101000011…
…00000000111100
3100010201122111012
413310030000330
5232031334322
621002214352
73151340405
oct764140074
9303648435
10131121212
1168018342
1237ab43b8
132121bc21
14135b29ac
15b7a0ae2
hex7d0c03c

131121212 has 6 divisors (see below), whose sum is σ = 229462128. Its totient is φ = 65560604.

The previous prime is 131121181. The next prime is 131121241. The reversal of 131121212 is 212121131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16390148 + ... + 16390155.

It is an arithmetic number, because the mean of its divisors is an integer number (38243688).

Almost surely, 2131121212 is an apocalyptic number.

It is an amenable number.

131121212 is a deficient number, since it is larger than the sum of its proper divisors (98340916).

131121212 is a wasteful number, since it uses less digits than its factorization.

131121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32780307 (or 32780305 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 131121212 is about 11450.8170887496. The cubic root of 131121212 is about 508.0319022270.

Adding to 131121212 its reverse (212121131), we get a palindrome (343242343).

The spelling of 131121212 in words is "one hundred thirty-one million, one hundred twenty-one thousand, two hundred twelve".

Divisors: 1 2 4 32780303 65560606 131121212