1221122211022 has 32 divisors (see below), whose sum is σ = 2177150367744. Its totient is φ = 502787628000.

The previous prime is 1221122211011. The next prime is 1221122211053. The reversal of 1221122211022 is 2201122211221.

It is a super-2 number, since 2×1221122211022² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16589854 + ... + 16663297.

It is an arithmetic number, because the mean of its divisors is an integer number (68035948992).

Almost surely, 2^{1221122211022} is an apocalyptic number.

1221122211022 is a deficient number, since it is larger than the sum of its proper divisors (956028156722).

1221122211022 is a wasteful number, since it uses less digits than its factorization.

1221122211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33253264.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221122211022 its reverse (2201122211221), we get a palindrome (3422244422243).

The spelling of 1221122211022 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, twenty-two".