1221222111022 has 32 divisors (see below), whose sum is σ = 1976452545024. Its totient is φ = 563852390400.

The previous prime is 1221222111007. The next prime is 1221222111059. The reversal of 1221222111022 is 2201112221221.

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, 813979 + ... + 1762102.

It is an arithmetic number, because the mean of its divisors is an integer number (61764142032).

Almost surely, 2^{1221222111022} is an apocalyptic number.

1221222111022 is a deficient number, since it is larger than the sum of its proper divisors (755230434002).

1221222111022 is a wasteful number, since it uses less digits than its factorization.

1221222111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576364.

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

Adding to 1221222111022 its reverse (2201112221221), we get a palindrome (3422334332243).

The spelling of 1221222111022 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, twenty-two".