221120122020 has 48 divisors (see below), whose sum is σ = 707584391808. Its totient is φ = 50541742080.

The previous prime is 221120121941. The next prime is 221120122031. The reversal of 221120122020 is 20221021122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 263237821 + ... + 263238660.

It is an arithmetic number, because the mean of its divisors is an integer number (14741341496).

Almost surely, 2^221120122020 is an apocalyptic number.

221120122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120122020 is an abundant number, since it is smaller than the sum of its proper divisors (486464269788).

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

221120122020 is a wasteful number, since it uses less digits than its factorization.

221120122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526476500 (or 526476498 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221120122020 its reverse (20221021122), we get a palindrome (241341143142).

The spelling of 221120122020 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, twenty".