1221121012022 has 32 divisors (see below), whose sum is σ = 2026489881600. Its totient is φ = 548916559488.

The previous prime is 1221121012021. The next prime is 1221121012057. The reversal of 1221121012022 is 2202101211221.

It is a super-2 number, since 2×1221121012022² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221121012021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478622 + ... + 1634417.

It is an arithmetic number, because the mean of its divisors is an integer number (63327808800).

Almost surely, 2^{1221121012022} is an apocalyptic number.

1221121012022 is a deficient number, since it is larger than the sum of its proper divisors (805368869578).

1221121012022 is a wasteful number, since it uses less digits than its factorization.

1221121012022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113820.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221121012022 its reverse (2202101211221), we get a palindrome (3423222223243).

The spelling of 1221121012022 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, twenty-two".