10910920921921 has 2 divisors, whose sum is σ = 10910920921922. Its totient is φ = 10910920921920.

The previous prime is 10910920921909. The next prime is 10910920921963. The reversal of 10910920921921 is 12912902901901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10464578010000 + 446342911921 = 3234900^2 + 668089^2 .

It is a cyclic number.

It is not a de Polignac number, because 10910920921921 - 2¹⁵ = 10910920889153 is a prime.

It is not a weakly prime, because it can be changed into another prime (10910920921981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5455460460960 + 5455460460961.

It is an arithmetic number, because the mean of its divisors is an integer number (5455460460961).

Almost surely, 2^{10910920921921} is an apocalyptic number.

It is an amenable number.

10910920921921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10910920921921 is an equidigital number, since it uses as much as digits as its factorization.

10910920921921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 10910920921921 in words is "ten trillion, nine hundred ten billion, nine hundred twenty million, nine hundred twenty-one thousand, nine hundred twenty-one".