221222222210122 has 12 divisors (see below), whose sum is σ = 386010204060690. Its totient is φ = 94809523804296.

The previous prime is 221222222210089. The next prime is 221222222210123. The reversal of 221222222210122 is 221012222222122.

221222222210122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 177996449423961 + 43225772786161 = 13341531^2 + 6574631^2 .

It is not an unprimeable number, because it can be changed into a prime (221222222210123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128684807097 + ... + 1128684807292.

Almost surely, 2^{221222222210122} is an apocalyptic number.

221222222210122 is a deficient number, since it is larger than the sum of its proper divisors (164787981850568).

221222222210122 is a wasteful number, since it uses less digits than its factorization.

221222222210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257369614405 (or 2257369614398 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 221222222210122 its reverse (221012222222122), we get a palindrome (442234444432244).

The spelling of 221222222210122 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred ten thousand, one hundred twenty-two".