10213666021 has 16 divisors (see below), whose sum is σ = 11391625728. Its totient is φ = 9097401600.

The previous prime is 10213666019. The next prime is 10213666027. The reversal of 10213666021 is 12066631201.

It is a cyclic number.

It is not a de Polignac number, because 10213666021 - 2¹ = 10213666019 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 (10213666027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74340 + ... + 161101.

It is an arithmetic number, because the mean of its divisors is an integer number (711976608).

Almost surely, 2^10213666021 is an apocalyptic number.

It is an amenable number.

10213666021 is a deficient number, since it is larger than the sum of its proper divisors (1177959707).

10213666021 is a wasteful number, since it uses less digits than its factorization.

10213666021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235572.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 10213666021 in words is "ten billion, two hundred thirteen million, six hundred sixty-six thousand, twenty-one".