20002021011021 has 24 divisors (see below), whose sum is σ = 32093320137120. Its totient is φ = 11035597796832.

The previous prime is 20002021010977. The next prime is 20002021011023. The reversal of 20002021011021 is 12011012020002.

It is not a de Polignac number, because 20002021011021 - 2³⁰ = 20000947269197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002021010988 and 20002021011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002021011023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2345998671 + ... + 2346007196.

It is an arithmetic number, because the mean of its divisors is an integer number (1337221672380).

Almost surely, 2^{20002021011021} is an apocalyptic number.

20002021011021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20002021011021 is a deficient number, since it is larger than the sum of its proper divisors (12091299126099).

20002021011021 is a wasteful number, since it uses less digits than its factorization.

20002021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692005913 (or 4692005906 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20002021011021 its reverse (12011012020002), we get a palindrome (32013033031023).

The spelling of 20002021011021 in words is "twenty trillion, two billion, twenty-one million, eleven thousand, twenty-one".