1220332113021 has 32 divisors (see below), whose sum is σ = 1903186022400. Its totient is φ = 681034067136.

The previous prime is 1220332113019. The next prime is 1220332113029. The reversal of 1220332113021 is 1203112330221.

It is not a de Polignac number, because 1220332113021 - 2¹ = 1220332113019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220332113029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 862846 + ... + 1784703.

It is an arithmetic number, because the mean of its divisors is an integer number (59474563200).

Almost surely, 2^{1220332113021} is an apocalyptic number.

It is an amenable number.

1220332113021 is a deficient number, since it is larger than the sum of its proper divisors (682853909379).

1220332113021 is a wasteful number, since it uses less digits than its factorization.

1220332113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648073.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1220332113021 its reverse (1203112330221), we get a palindrome (2423444443242).

The spelling of 1220332113021 in words is "one trillion, two hundred twenty billion, three hundred thirty-two million, one hundred thirteen thousand, twenty-one".