1221321122 has 32 divisors (see below), whose sum is σ = 2145623040. Its totient is φ = 510578640.

The previous prime is 1221321113. The next prime is 1221321133. The reversal of 1221321122 is 2211231221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221321122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102563 + ... + 113849.

It is an arithmetic number, because the mean of its divisors is an integer number (67050720).

Almost surely, 2^1221321122 is an apocalyptic number.

1221321122 is a deficient number, since it is larger than the sum of its proper divisors (924301918).

1221321122 is a wasteful number, since it uses less digits than its factorization.

1221321122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11486.

The product of its digits is 96, while the sum is 17.

The square root of 1221321122 is about 34947.4050824950. The cubic root of 1221321122 is about 1068.9152899536.

Adding to 1221321122 its reverse (2211231221), we get a palindrome (3432552343).

The spelling of 1221321122 in words is "one billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-two".