10101522021 has 4 divisors (see below), whose sum is σ = 13468696032. Its totient is φ = 6734348012.

The previous prime is 10101522017. The next prime is 10101522023. The reversal of 10101522021 is 12022510101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10101522021 - 2² = 10101522017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101522023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683587001 + ... + 1683587006.

It is an arithmetic number, because the mean of its divisors is an integer number (3367174008).

Almost surely, 2^10101522021 is an apocalyptic number.

It is an amenable number.

10101522021 is a deficient number, since it is larger than the sum of its proper divisors (3367174011).

10101522021 is an equidigital number, since it uses as much as digits as its factorization.

10101522021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367174010.

The product of its (nonzero) digits is 40, while the sum is 15.

The spelling of 10101522021 in words is "ten billion, one hundred one million, five hundred twenty-two thousand, twenty-one".