10122110210921 has 2 divisors, whose sum is σ = 10122110210922. Its totient is φ = 10122110210920.

The previous prime is 10122110210827. The next prime is 10122110210929. The reversal of 10122110210921 is 12901201122101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6549688903696 + 3572421307225 = 2559236^2 + 1890085^2 .

It is a cyclic number.

It is not a de Polignac number, because 10122110210921 - 2³⁰ = 10121036469097 is a prime.

It is a super-2 number, since 2×10122110210921² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10122110210929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061055105460 + 5061055105461.

It is an arithmetic number, because the mean of its divisors is an integer number (5061055105461).

Almost surely, 2^{10122110210921} is an apocalyptic number.

It is an amenable number.

10122110210921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10122110210921 is an equidigital number, since it uses as much as digits as its factorization.

10122110210921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 10122110210921 in words is "ten trillion, one hundred twenty-two billion, one hundred ten million, two hundred ten thousand, nine hundred twenty-one".