20211023021220 has 72 divisors (see below), whose sum is σ = 61329587364864. Its totient is φ = 5387600202048.

The previous prime is 20211023021207. The next prime is 20211023021237. The reversal of 20211023021220 is 2212032011202.

20211023021220 is a `hidden beast` number, since 2 + 0 + 211 + 0 + 230 + 2 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20211023021193 and 20211023021202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20410174 + ... + 21377493.

It is an arithmetic number, because the mean of its divisors is an integer number (851799824512).

Almost surely, 2^{20211023021220} is an apocalyptic number.

20211023021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211023021220 is an abundant number, since it is smaller than the sum of its proper divisors (41118564343644).

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

20211023021220 is a wasteful number, since it uses less digits than its factorization.

20211023021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41790369 (or 41790364 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20211023021220 its reverse (2212032011202), we get a palindrome (22423055032422).

The spelling of 20211023021220 in words is "twenty trillion, two hundred eleven billion, twenty-three million, twenty-one thousand, two hundred twenty".