20200012020021 has 4 divisors (see below), whose sum is σ = 26933349360032. Its totient is φ = 13466674680012.

The previous prime is 20200012019981. The next prime is 20200012020031. The reversal of 20200012020021 is 12002021000202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20200012020021 - 2¹⁰ = 20200012018997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200012019979 and 20200012020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200012020031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366668670001 + ... + 3366668670006.

It is an arithmetic number, because the mean of its divisors is an integer number (6733337340008).

Almost surely, 2^{20200012020021} is an apocalyptic number.

It is an amenable number.

20200012020021 is a deficient number, since it is larger than the sum of its proper divisors (6733337340011).

20200012020021 is an equidigital number, since it uses as much as digits as its factorization.

20200012020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733337340010.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20200012020021 its reverse (12002021000202), we get a palindrome (32202033020223).

The spelling of 20200012020021 in words is "twenty trillion, two hundred billion, twelve million, twenty thousand, twenty-one".