1221023300022 has 32 divisors (see below), whose sum is σ = 2728543708800. Its totient is φ = 404733977064.

The previous prime is 1221023299927. The next prime is 1221023300093. The reversal of 1221023300022 is 2200033201221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1221023299968 and 1221023300004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63151068 + ... + 63170399.

It is an arithmetic number, because the mean of its divisors is an integer number (85266990900).

Almost surely, 2^{1221023300022} is an apocalyptic number.

1221023300022 is an abundant number, since it is smaller than the sum of its proper divisors (1507520408778).

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

1221023300022 is a wasteful number, since it uses less digits than its factorization.

1221023300022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126321657 (or 126321651 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1221023300022 its reverse (2200033201221), we get a palindrome (3421056501243).

The spelling of 1221023300022 in words is "one trillion, two hundred twenty-one billion, twenty-three million, three hundred thousand, twenty-two".