231231232021212 has 144 divisors (see below), whose sum is σ = 592166792441952. Its totient is φ = 76074909696000.

The previous prime is 231231232021177. The next prime is 231231232021249. The reversal of 231231232021212 is 212120232132132.

231231232021212 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 312 + 320 + 2 + 1 + 21 + 2 = 666.

It is a super-3 number, since 3×231231232021212³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 447936678 + ... + 448452594.

It is an arithmetic number, because the mean of its divisors is an integer number (4112269391958).

Almost surely, 2^{231231232021212} is an apocalyptic number.

It is an amenable number.

231231232021212 is an abundant number, since it is smaller than the sum of its proper divisors (360935560420740).

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

231231232021212 is a wasteful number, since it uses less digits than its factorization.

231231232021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516628 (or 516623 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 231231232021212 its reverse (212120232132132), we get a palindrome (443351464153344).

The spelling of 231231232021212 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, two hundred thirty-two million, twenty-one thousand, two hundred twelve".