231212121113233 has 32 divisors (see below), whose sum is σ = 249740798209056. Its totient is φ = 212790739488768.

The previous prime is 231212121113231. The next prime is 231212121113249. The reversal of 231212121113233 is 332311121212132.

It can be written as a sum of positive squares in 16 ways, for example, as 135361520443009 + 95850600670224 = 11634497^2 + 9790332^2 .

It is a cyclic number.

It is not a de Polignac number, because 231212121113233 - 2¹ = 231212121113231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231212121113231) 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, 21335430691 + ... + 21335441527.

It is an arithmetic number, because the mean of its divisors is an integer number (7804399944033).

Almost surely, 2^{231212121113233} is an apocalyptic number.

It is an amenable number.

231212121113233 is a deficient number, since it is larger than the sum of its proper divisors (18528677095823).

231212121113233 is a wasteful number, since it uses less digits than its factorization.

231212121113233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14773.

The product of its digits is 2592, while the sum is 28.

Adding to 231212121113233 its reverse (332311121212132), we get a palindrome (563523242325365).

The spelling of 231212121113233 in words is "two hundred thirty-one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred thirteen thousand, two hundred thirty-three".