20202020221220 has 48 divisors (see below), whose sum is σ = 44924434410240. Its totient is φ = 7604679427584.

The previous prime is 20202020221219. The next prime is 20202020221337. The reversal of 20202020221220 is 2212202020202.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221447 + ... + 6360273.

It is an arithmetic number, because the mean of its divisors is an integer number (935925716880).

Almost surely, 2^{20202020221220} is an apocalyptic number.

20202020221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202020221220 is an abundant number, since it is smaller than the sum of its proper divisors (24722414189020).

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

20202020221220 is a wasteful number, since it uses less digits than its factorization.

20202020221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148532 (or 6148530 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20202020221220 its reverse (2212202020202), we get a palindrome (22414222241422).

The spelling of 20202020221220 in words is "twenty trillion, two hundred two billion, twenty million, two hundred twenty-one thousand, two hundred twenty".