102031131149 has 2 divisors, whose sum is σ = 102031131150. Its totient is φ = 102031131148.

The previous prime is 102031131121. The next prime is 102031131211. The reversal of 102031131149 is 941131130201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69613128649 + 32418002500 = 263843^2 + 180050^2 .

It is a cyclic number.

It is not a de Polignac number, because 102031131149 - 2²⁰ = 102030082573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102031131949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51015565574 + 51015565575.

It is an arithmetic number, because the mean of its divisors is an integer number (51015565575).

Almost surely, 2^102031131149 is an apocalyptic number.

It is an amenable number.

102031131149 is a deficient number, since it is larger than the sum of its proper divisors (1).

102031131149 is an equidigital number, since it uses as much as digits as its factorization.

102031131149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 102031131149 in words is "one hundred two billion, thirty-one million, one hundred thirty-one thousand, one hundred forty-nine".