231212132120 has 16 divisors (see below), whose sum is σ = 520227297360. Its totient is φ = 92484852832.

The previous prime is 231212132117. The next prime is 231212132161. The reversal of 231212132120 is 21231212132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231212132092 and 231212132101.

It is a congruent number.

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, 2890151612 + ... + 2890151691.

It is an arithmetic number, because the mean of its divisors is an integer number (32514206085).

Almost surely, 2^231212132120 is an apocalyptic number.

231212132120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231212132120 is an abundant number, since it is smaller than the sum of its proper divisors (289015165240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231212132120 is a wasteful number, since it uses less digits than its factorization.

231212132120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780303314 (or 5780303310 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231212132120 its reverse (21231212132), we get a palindrome (252443344252).

The spelling of 231212132120 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred thirty-two thousand, one hundred twenty".