102012201021961 has 2 divisors, whose sum is σ = 102012201021962. Its totient is φ = 102012201021960.

The previous prime is 102012201021949. The next prime is 102012201022021. The reversal of 102012201021961 is 169120102210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100378357210000 + 1633843811961 = 10018900^2 + 1278219^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012201021961 - 2⁹ = 102012201021449 is a prime.

It is not a weakly prime, because it can be changed into another prime (102012201021911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006100510980 + 51006100510981.

It is an arithmetic number, because the mean of its divisors is an integer number (51006100510981).

Almost surely, 2^{102012201021961} is an apocalyptic number.

It is an amenable number.

102012201021961 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012201021961 is an equidigital number, since it uses as much as digits as its factorization.

102012201021961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 102012201021961 in words is "one hundred two trillion, twelve billion, two hundred one million, twenty-one thousand, nine hundred sixty-one".