202120124220 has 144 divisors (see below), whose sum is σ = 719620644288. Its totient is φ = 44950256640.

The previous prime is 202120124191. The next prime is 202120124251. The reversal of 202120124220 is 22421021202.

202120124220 is a `hidden beast` number, since 20 + 21 + 201 + 2 + 422 + 0 = 666.

It is a super-2 number, since 2×202120124220² (a number of 23 digits) contains 22 as substring.

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 = 202120124193 and 202120124202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2121121 + ... + 2214360.

Almost surely, 2^202120124220 is an apocalyptic number.

202120124220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120124220 is an abundant number, since it is smaller than the sum of its proper divisors (517500520068).

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

202120124220 is a wasteful number, since it uses less digits than its factorization.

202120124220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335540 (or 4335535 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202120124220 its reverse (22421021202), we get a palindrome (224541145422).

The spelling of 202120124220 in words is "two hundred two billion, one hundred twenty million, one hundred twenty-four thousand, two hundred twenty".