20210011220 has 72 divisors (see below), whose sum is σ = 50704773504. Its totient is φ = 6627855168.

The previous prime is 20210011201. The next prime is 20210011259. The reversal of 20210011220 is 2211001202.

It is a happy number.

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, 62384 + ... + 210503.

Almost surely, 2^20210011220 is an apocalyptic number.

20210011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210011220 is an abundant number, since it is smaller than the sum of its proper divisors (30494762284).

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

20210011220 is a wasteful number, since it uses less digits than its factorization.

20210011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272949 (or 272924 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20210011220 its reverse (2211001202), we get a palindrome (22421012422).

The spelling of 20210011220 in words is "twenty billion, two hundred ten million, eleven thousand, two hundred twenty".