131121203212 has 12 divisors (see below), whose sum is σ = 229473802656. Its totient is φ = 65557259600.

The previous prime is 131121203131. The next prime is 131121203231. The reversal of 131121203212 is 212302121131.

It is a self number, because there is not a number n which added to its sum of digits gives 131121203212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746164 + ... + 904987.

It is an arithmetic number, because the mean of its divisors is an integer number (19122816888).

Almost surely, 2^131121203212 is an apocalyptic number.

It is an amenable number.

131121203212 is a deficient number, since it is larger than the sum of its proper divisors (98352599444).

131121203212 is a wasteful number, since it uses less digits than its factorization.

131121203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671008 (or 1671006 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131121203212 its reverse (212302121131), we get a palindrome (343423324343).

The spelling of 131121203212 in words is "one hundred thirty-one billion, one hundred twenty-one million, two hundred three thousand, two hundred twelve".