231212102402 has 32 divisors (see below), whose sum is σ = 373699094832. Its totient is φ = 106897342464.

The previous prime is 231212102389. The next prime is 231212102413. The reversal of 231212102402 is 204201212132.

It can be written as a sum of positive squares in 8 ways, for example, as 179031380641 + 52180721761 = 423121^2 + 228431^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456638 + ... + 819110.

Almost surely, 2^231212102402 is an apocalyptic number.

231212102402 is a deficient number, since it is larger than the sum of its proper divisors (142486992430).

231212102402 is a wasteful number, since it uses less digits than its factorization.

231212102402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362822.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 231212102402 its reverse (204201212132), we get a palindrome (435413314534).

The spelling of 231212102402 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred two thousand, four hundred two".