221222021122 has 8 divisors (see below), whose sum is σ = 351352621836. Its totient is φ = 104104480512.

The previous prime is 221222021117. The next prime is 221222021179. The reversal of 221222021122 is 221120222122.

It can be written as a sum of positive squares in 2 ways, for example, as 218931345801 + 2290675321 = 467901^2 + 47861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221222021122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221222021122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3253264983 + ... + 3253265050.

Almost surely, 2^221222021122 is an apocalyptic number.

221222021122 is a deficient number, since it is larger than the sum of its proper divisors (130130600714).

221222021122 is a wasteful number, since it uses less digits than its factorization.

221222021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506530052.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221222021122 its reverse (221120222122), we get a palindrome (442342243244).

The spelling of 221222021122 in words is "two hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-two".