221100122020000 has 60 divisors (see below), whose sum is σ = 543939465236706. Its totient is φ = 88440048800000.

The previous prime is 221100122019977. The next prime is 221100122020021. The reversal of 221100122020000 is 20221001122.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 38021578474896 + 183078543545104 = 6166164^2 + 13530652^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5527483051 + ... + 5527523050.

Almost surely, 2^{221100122020000} is an apocalyptic number.

221100122020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100122020000 is an abundant number, since it is smaller than the sum of its proper divisors (322839343216706).

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

221100122020000 is an equidigital number, since it uses as much as digits as its factorization.

221100122020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11055006131 (or 11055006108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221100122020000 its reverse (20221001122), we get a palindrome (221120343021122).

The spelling of 221100122020000 in words is "two hundred twenty-one trillion, one hundred billion, one hundred twenty-two million, twenty thousand".