131212241223402 has 32 divisors (see below), whose sum is σ = 262871200380672. Its totient is φ = 43662970862784.

The previous prime is 131212241223331. The next prime is 131212241223407. The reversal of 131212241223402 is 204322142212131.

It is a self number, because there is not a number n which added to its sum of digits gives 131212241223402.

It is not an unprimeable number, because it can be changed into a prime (131212241223407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50960143 + ... + 53472989.

It is an arithmetic number, because the mean of its divisors is an integer number (8214725011896).

Almost surely, 2^{131212241223402} is an apocalyptic number.

131212241223402 is an abundant number, since it is smaller than the sum of its proper divisors (131658959157270).

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

131212241223402 is a wasteful number, since it uses less digits than its factorization.

131212241223402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527662.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 131212241223402 its reverse (204322142212131), we get a palindrome (335534383435533).

The spelling of 131212241223402 in words is "one hundred thirty-one trillion, two hundred twelve billion, two hundred forty-one million, two hundred twenty-three thousand, four hundred two".