20021021202010 has 16 divisors (see below), whose sum is σ = 38157710997096. Its totient is φ = 7537325628928.

The previous prime is 20021021201977. The next prime is 20021021202043. The reversal of 20021021202010 is 1020212012002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20021021201977) and next prime (20021021202043).

It can be written as a sum of positive squares in 4 ways, for example, as 19619221150881 + 401800051129 = 4429359^2 + 633877^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58885356307 + ... + 58885356646.

Almost surely, 2^{20021021202010} is an apocalyptic number.

20021021202010 is a deficient number, since it is larger than the sum of its proper divisors (18136689795086).

20021021202010 is a wasteful number, since it uses less digits than its factorization.

20021021202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117770712977.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021021202010 its reverse (1020212012002), we get a palindrome (21041233214012).

The spelling of 20021021202010 in words is "twenty trillion, twenty-one billion, twenty-one million, two hundred two thousand, ten".