221021222120122 has 16 divisors (see below), whose sum is σ = 342964345854600. Its totient is φ = 106699781957440.

The previous prime is 221021222120099. The next prime is 221021222120129.

221021222120122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 174014854377961 + 47006367742161 = 13191469^2 + 6856119^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221021222120093 and 221021222120102.

It is not an unprimeable number, because it can be changed into a prime (221021222120129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74103972 + ... + 77028832.

Almost surely, 2^{221021222120122} is an apocalyptic number.

221021222120122 is a deficient number, since it is larger than the sum of its proper divisors (121943123734478).

221021222120122 is a wasteful number, since it uses less digits than its factorization.

221021222120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227761.

The product of its (nonzero) digits is 512, while the sum is 22.

The spelling of 221021222120122 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twenty-two".