231212753811 has 12 divisors (see below), whose sum is σ = 359664283888. Its totient is φ = 142284771504.

The previous prime is 231212753809. The next prime is 231212753813. The reversal of 231212753811 is 118357212132.

231212753811 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 1 + 275 + 381 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (231212753809) and next prime (231212753813).

It is not a de Polignac number, because 231212753811 - 2¹ = 231212753809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231212753813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988088575 + ... + 988088808.

Almost surely, 2^231212753811 is an apocalyptic number.

231212753811 is a deficient number, since it is larger than the sum of its proper divisors (128451530077).

231212753811 is a wasteful number, since it uses less digits than its factorization.

231212753811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976177402 (or 1976177399 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

Adding to 231212753811 its reverse (118357212132), we get a palindrome (349569965943).

The spelling of 231212753811 in words is "two hundred thirty-one billion, two hundred twelve million, seven hundred fifty-three thousand, eight hundred eleven".