131213122102 has 4 divisors (see below), whose sum is σ = 196819683156. Its totient is φ = 65606561050.

The previous prime is 131213122097. The next prime is 131213122111. The reversal of 131213122102 is 201221312131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201221312131 = 7 ⋅28745901733.

It is a self number, because there is not a number n which added to its sum of digits gives 131213122102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32803280524 + ... + 32803280527.

It is an arithmetic number, because the mean of its divisors is an integer number (49204920789).

Almost surely, 2^131213122102 is an apocalyptic number.

131213122102 is a deficient number, since it is larger than the sum of its proper divisors (65606561054).

131213122102 is an equidigital number, since it uses as much as digits as its factorization.

131213122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65606561053.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131213122102 its reverse (201221312131), we get a palindrome (332434434233).

The spelling of 131213122102 in words is "one hundred thirty-one billion, two hundred thirteen million, one hundred twenty-two thousand, one hundred two".