10197202021 has 4 divisors (see below), whose sum is σ = 10797037452. Its totient is φ = 9597366592.

The previous prime is 10197202013. The next prime is 10197202033. The reversal of 10197202021 is 12020279101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8782313796 + 1414888225 = 93714^2 + 37615^2 .

It is not a de Polignac number, because 10197202021 - 2³ = 10197202013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10197202091) 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, 299917690 + ... + 299917723.

It is an arithmetic number, because the mean of its divisors is an integer number (2699259363).

Almost surely, 2^10197202021 is an apocalyptic number.

It is an amenable number.

10197202021 is a deficient number, since it is larger than the sum of its proper divisors (599835431).

10197202021 is an equidigital number, since it uses as much as digits as its factorization.

10197202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599835430.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 10197202021 in words is "ten billion, one hundred ninety-seven million, two hundred two thousand, twenty-one".