103131212012109 has 32 divisors (see below), whose sum is σ = 155527987084800. Its totient is φ = 67528569991680.

The previous prime is 103131212012099. The next prime is 103131212012137. The reversal of 103131212012109 is 901210212131301.

103131212012109 is a `hidden beast` number, since 1 + 0 + 313 + 12 + 120 + 1 + 210 + 9 = 666.

It is not a de Polignac number, because 103131212012109 - 2⁴⁰ = 102031700384333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103131212012009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108994012 + ... + 109936149.

It is an arithmetic number, because the mean of its divisors is an integer number (4860249596400).

Almost surely, 2^{103131212012109} is an apocalyptic number.

It is an amenable number.

103131212012109 is a deficient number, since it is larger than the sum of its proper divisors (52396775072691).

103131212012109 is a wasteful number, since it uses less digits than its factorization.

103131212012109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218930482 (or 218930476 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 103131212012109 in words is "one hundred three trillion, one hundred thirty-one billion, two hundred twelve million, twelve thousand, one hundred nine".