120312213231 has 32 divisors (see below), whose sum is σ = 193073920000. Its totient is φ = 65100399840.

The previous prime is 120312213223. The next prime is 120312213347. The reversal of 120312213231 is 132312213021.

It is not a de Polignac number, because 120312213231 - 2³ = 120312213223 is a prime.

It is a super-2 number, since 2×120312213231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120312213198 and 120312213207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120312213031) 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, 779520 + ... + 921018.

It is an arithmetic number, because the mean of its divisors is an integer number (6033560000).

Almost surely, 2^120312213231 is an apocalyptic number.

120312213231 is a deficient number, since it is larger than the sum of its proper divisors (72761706769).

120312213231 is a wasteful number, since it uses less digits than its factorization.

120312213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143659.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 120312213231 its reverse (132312213021), we get a palindrome (252624426252).

The spelling of 120312213231 in words is "one hundred twenty billion, three hundred twelve million, two hundred thirteen thousand, two hundred thirty-one".