21022020202120 has 32 divisors (see below), whose sum is σ = 54056623377600. Its totient is φ = 7207549783488.

The previous prime is 21022020202069. The next prime is 21022020202133. The reversal of 21022020202120 is 2120202022012.

It is a junction number, because it is equal to n+sod(n) for n = 21022020202094 and 21022020202103.

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, 37539321510 + ... + 37539322069.

It is an arithmetic number, because the mean of its divisors is an integer number (1689269480550).

Almost surely, 2^{21022020202120} is an apocalyptic number.

21022020202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022020202120 is an abundant number, since it is smaller than the sum of its proper divisors (33034603175480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022020202120 is a wasteful number, since it uses less digits than its factorization.

21022020202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75078643597 (or 75078643593 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21022020202120 its reverse (2120202022012), we get a palindrome (23142222224132).

The spelling of 21022020202120 in words is "twenty-one trillion, twenty-two billion, twenty million, two hundred two thousand, one hundred twenty".