1220122022021 has 12 divisors (see below), whose sum is σ = 1442593254060. Its totient is φ = 1028674301760.

The previous prime is 1220122021967. The next prime is 1220122022027. The reversal of 1220122022021 is 1202202210221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 592113321121 + 628008700900 = 769489^2 + 792470^2 .

It is not a de Polignac number, because 1220122022021 - 2¹⁴ = 1220122005637 is a prime.

It is a super-2 number, since 2×1220122022021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220122022027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204099056 + ... + 204105033.

It is an arithmetic number, because the mean of its divisors is an integer number (120216104505).

Almost surely, 2^{1220122022021} is an apocalyptic number.

It is an amenable number.

1220122022021 is a deficient number, since it is larger than the sum of its proper divisors (222471232039).

1220122022021 is an equidigital number, since it uses as much as digits as its factorization.

1220122022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408204164 (or 408204157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220122022021 its reverse (1202202210221), we get a palindrome (2422324232242).

The spelling of 1220122022021 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, twenty-two thousand, twenty-one".