10202010021 has 160 divisors (see below), whose sum is σ = 18890403840. Its totient is φ = 5363293824.

The previous prime is 10202009977. The next prime is 10202010031. The reversal of 10202010021 is 12001020201.

It is not a de Polignac number, because 10202010021 - 2⁹ = 10202009509 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 = 10202009985 and 10202010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202010031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 33231150 + ... + 33231456.

It is an arithmetic number, because the mean of its divisors is an integer number (118065024).

Almost surely, 2^10202010021 is an apocalyptic number.

It is an amenable number.

10202010021 is a deficient number, since it is larger than the sum of its proper divisors (8688393819).

10202010021 is a wasteful number, since it uses less digits than its factorization.

10202010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 436 counting only the distinct ones).

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

Adding to 10202010021 its reverse (12001020201), we get a palindrome (22203030222).

The spelling of 10202010021 in words is "ten billion, two hundred two million, ten thousand, twenty-one".