1221102110022 has 32 divisors (see below), whose sum is σ = 2461809841152. Its totient is φ = 403774978464.

The previous prime is 1221102109967. The next prime is 1221102110029. The reversal of 1221102110022 is 2200112011221.

It is a junction number, because it is equal to n+sod(n) for n = 1221102109983 and 1221102110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221102110029) 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, 495988 + ... + 1639575.

It is an arithmetic number, because the mean of its divisors is an integer number (76931557536).

Almost surely, 2^{1221102110022} is an apocalyptic number.

1221102110022 is an abundant number, since it is smaller than the sum of its proper divisors (1240707731130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221102110022 is a wasteful number, since it uses less digits than its factorization.

1221102110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136332.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221102110022 its reverse (2200112011221), we get a palindrome (3421214121243).

The spelling of 1221102110022 in words is "one trillion, two hundred twenty-one billion, one hundred two million, one hundred ten thousand, twenty-two".