20212100202021 has 32 divisors (see below), whose sum is σ = 34065022672128. Its totient is φ = 10373183585280.

The previous prime is 20212100202017. The next prime is 20212100202043. The reversal of 20212100202021 is 12020200121202.

It is not a de Polignac number, because 20212100202021 - 2² = 20212100202017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212100202821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1000489860 + ... + 1000510061.

It is an arithmetic number, because the mean of its divisors is an integer number (1064531958504).

Almost surely, 2^{20212100202021} is an apocalyptic number.

20212100202021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20212100202021 is a deficient number, since it is larger than the sum of its proper divisors (13852922470107).

20212100202021 is a wasteful number, since it uses less digits than its factorization.

20212100202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000999981.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20212100202021 its reverse (12020200121202), we get a palindrome (32232300323223).

The spelling of 20212100202021 in words is "twenty trillion, two hundred twelve billion, one hundred million, two hundred two thousand, twenty-one".