2101122210989 has 2 divisors, whose sum is σ = 2101122210990. Its totient is φ = 2101122210988.

The previous prime is 2101122210977. The next prime is 2101122211037. The reversal of 2101122210989 is 9890122211012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1501318430089 + 599803780900 = 1225283^2 + 774470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101122210989 - 2¹² = 2101122206893 is a prime.

It is a super-2 number, since 2×2101122210989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101122210959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050561105494 + 1050561105495.

It is an arithmetic number, because the mean of its divisors is an integer number (1050561105495).

Almost surely, 2^{2101122210989} is an apocalyptic number.

It is an amenable number.

2101122210989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101122210989 is an equidigital number, since it uses as much as digits as its factorization.

2101122210989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 2101122210989 in words is "two trillion, one hundred one billion, one hundred twenty-two million, two hundred ten thousand, nine hundred eighty-nine".