1220332112021 has 16 divisors (see below), whose sum is σ = 1355941278720. Its totient is φ = 1088893092720.

The previous prime is 1220332112009. The next prime is 1220332112033. The reversal of 1220332112021 is 1202112330221.

It is an interprime number because it is at equal distance from previous prime (1220332112009) and next prime (1220332112033).

It is a cyclic number.

It is not a de Polignac number, because 1220332112021 - 2²⁶ = 1220265003157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220332111984 and 1220332112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220332112071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044845 + ... + 1879458.

It is an arithmetic number, because the mean of its divisors is an integer number (84746329920).

Almost surely, 2^{1220332112021} is an apocalyptic number.

1220332112021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220332112021 is a deficient number, since it is larger than the sum of its proper divisors (135609166699).

1220332112021 is a wasteful number, since it uses less digits than its factorization.

1220332112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925016.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1220332112021 its reverse (1202112330221), we get a palindrome (2422444442242).

The spelling of 1220332112021 in words is "one trillion, two hundred twenty billion, three hundred thirty-two million, one hundred twelve thousand, twenty-one".