20210231120220 has 72 divisors (see below), whose sum is σ = 61911341724960. Its totient is φ = 5336034614400.

The previous prime is 20210231120143. The next prime is 20210231120279. The reversal of 20210231120220 is 2202113201202.

20210231120220 is a `hidden beast` number, since 2 + 0 + 210 + 231 + 1 + 2 + 0 + 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 = 20210231120193 and 20210231120202.

It is a congruent number.

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, 555818760 + ... + 555855119.

It is an arithmetic number, because the mean of its divisors is an integer number (859879746180).

Almost surely, 2^{20210231120220} is an apocalyptic number.

20210231120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210231120220 is an abundant number, since it is smaller than the sum of its proper divisors (41701110604740).

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

20210231120220 is a wasteful number, since it uses less digits than its factorization.

20210231120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111673995 (or 1111673990 counting only the distinct ones).

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

Adding to 20210231120220 its reverse (2202113201202), we get a palindrome (22412344321422).

The spelling of 20210231120220 in words is "twenty trillion, two hundred ten billion, two hundred thirty-one million, one hundred twenty thousand, two hundred twenty".