1221110121022 has 24 divisors (see below), whose sum is σ = 2119282036200. Its totient is φ = 525836892240.

The previous prime is 1221110120983. The next prime is 1221110121043. The reversal of 1221110121022 is 2201210111221.

It is a super-2 number, since 2×1221110121022² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221110120987 and 1221110121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132782497 + ... + 132791692.

It is an arithmetic number, because the mean of its divisors is an integer number (88303418175).

Almost surely, 2^{1221110121022} is an apocalyptic number.

1221110121022 is a deficient number, since it is larger than the sum of its proper divisors (898171915178).

1221110121022 is a wasteful number, since it uses less digits than its factorization.

1221110121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265574232 (or 265574221 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221110121022 its reverse (2201210111221), we get a palindrome (3422320232243).

The spelling of 1221110121022 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, twenty-two".