10115501021 has 2 divisors, whose sum is σ = 10115501022. Its totient is φ = 10115501020.

The previous prime is 10115500981. The next prime is 10115501057. The reversal of 10115501021 is 12010551101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6418252996 + 3697248025 = 80114^2 + 60805^2 .

It is a cyclic number.

It is not a de Polignac number, because 10115501021 - 2²⁶ = 10048392157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10115506021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5057750510 + 5057750511.

It is an arithmetic number, because the mean of its divisors is an integer number (5057750511).

Almost surely, 2^10115501021 is an apocalyptic number.

It is an amenable number.

10115501021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10115501021 is an equidigital number, since it uses as much as digits as its factorization.

10115501021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50, while the sum is 17.

The spelling of 10115501021 in words is "ten billion, one hundred fifteen million, five hundred one thousand, twenty-one".