102131256226 has 4 divisors (see below), whose sum is σ = 153196884342. Its totient is φ = 51065628112.

The previous prime is 102131256211. The next prime is 102131256233. The reversal of 102131256226 is 622652131201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622652131201 = 17 ⋅36626595953.

It can be written as a sum of positive squares in only one way, i.e., 59536488001 + 42594768225 = 244001^2 + 206385^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532814055 + ... + 25532814058.

Almost surely, 2^102131256226 is an apocalyptic number.

102131256226 is a deficient number, since it is larger than the sum of its proper divisors (51065628116).

102131256226 is an equidigital number, since it uses as much as digits as its factorization.

102131256226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51065628115.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 102131256226 its reverse (622652131201), we get a palindrome (724783387427).

The spelling of 102131256226 in words is "one hundred two billion, one hundred thirty-one million, two hundred fifty-six thousand, two hundred twenty-six".