10100202021 has 72 divisors (see below), whose sum is σ = 18543258240. Its totient is φ = 5183388288.

The previous prime is 10100202019. The next prime is 10100202053. The reversal of 10100202021 is 12020200101.

It is not a de Polignac number, because 10100202021 - 2¹ = 10100202019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10100201994 and 10100202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100202121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 381120 + ... + 406758.

Almost surely, 2^10100202021 is an apocalyptic number.

It is an amenable number.

10100202021 is a deficient number, since it is larger than the sum of its proper divisors (8443056219).

10100202021 is a wasteful number, since it uses less digits than its factorization.

10100202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25715 (or 25699 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10100202021 its reverse (12020200101), we get a palindrome (22120402122).

The spelling of 10100202021 in words is "ten billion, one hundred million, two hundred two thousand, twenty-one".