221021242120122 has 48 divisors (see below), whose sum is σ = 470816159875488. Its totient is φ = 69140908064800.

The previous prime is 221021242120043. The next prime is 221021242120169.

221021242120122 is nontrivially palindromic in base 10.

221021242120122 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221021242120092 and 221021242120101.

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, 656765004 + ... + 657101447.

It is an arithmetic number, because the mean of its divisors is an integer number (9808669997406).

Almost surely, 2^{221021242120122} is an apocalyptic number.

221021242120122 is an abundant number, since it is smaller than the sum of its proper divisors (249794917755366).

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

221021242120122 is a wasteful number, since it uses less digits than its factorization.

221021242120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313866555 (or 1313866532 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The spelling of 221021242120122 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred forty-two million, one hundred twenty thousand, one hundred twenty-two".