2102010121997 has 2 divisors, whose sum is σ = 2102010121998. Its totient is φ = 2102010121996.

The previous prime is 2102010121987. The next prime is 2102010122071. The reversal of 2102010121997 is 7991210102012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1225878553636 + 876131568361 = 1107194^2 + 936019^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102010121997 - 2²⁶ = 2101943013133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102010121987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051005060998 + 1051005060999.

It is an arithmetic number, because the mean of its divisors is an integer number (1051005060999).

Almost surely, 2^{2102010121997} is an apocalyptic number.

It is an amenable number.

2102010121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102010121997 is an equidigital number, since it uses as much as digits as its factorization.

2102010121997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The spelling of 2102010121997 in words is "two trillion, one hundred two billion, ten million, one hundred twenty-one thousand, nine hundred ninety-seven".