131121213009 has 16 divisors (see below), whose sum is σ = 176181264000. Its totient is φ = 86738850176.

The previous prime is 131121213007. The next prime is 131121213023. The reversal of 131121213009 is 900312121131.

It is a cyclic number.

It is not a de Polignac number, because 131121213009 - 2¹ = 131121213007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131121213009.

It is not an unprimeable number, because it can be changed into a prime (131121213007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290197 + ... + 588605.

It is an arithmetic number, because the mean of its divisors is an integer number (11011329000).

Almost surely, 2^131121213009 is an apocalyptic number.

It is an amenable number.

131121213009 is a deficient number, since it is larger than the sum of its proper divisors (45060050991).

131121213009 is a wasteful number, since it uses less digits than its factorization.

131121213009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299544.

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 131121213009 in words is "one hundred thirty-one billion, one hundred twenty-one million, two hundred thirteen thousand, nine".