102100012111949 has 2 divisors, whose sum is σ = 102100012111950. Its totient is φ = 102100012111948.

The previous prime is 102100012111931. The next prime is 102100012112003. The reversal of 102100012111949 is 949111210001201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78809562375625 + 23290449736324 = 8877475^2 + 4826018^2 .

It is a cyclic number.

It is not a de Polignac number, because 102100012111949 - 2²⁸ = 102099743676493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102100012111249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050006055974 + 51050006055975.

It is an arithmetic number, because the mean of its divisors is an integer number (51050006055975).

Almost surely, 2^{102100012111949} is an apocalyptic number.

It is an amenable number.

102100012111949 is a deficient number, since it is larger than the sum of its proper divisors (1).

102100012111949 is an equidigital number, since it uses as much as digits as its factorization.

102100012111949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 102100012111949 in words is "one hundred two trillion, one hundred billion, twelve million, one hundred eleven thousand, nine hundred forty-nine".