1220022122021 has 2 divisors, whose sum is σ = 1220022122022. Its totient is φ = 1220022122020.

The previous prime is 1220022122003. The next prime is 1220022122117. The reversal of 1220022122021 is 1202212200221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1008339313921 + 211682808100 = 1004161^2 + 460090^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220022122021 - 2³⁴ = 1202842252837 is a prime.

It is a super-3 number, since 3×1220022122021³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220022122821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610011061010 + 610011061011.

It is an arithmetic number, because the mean of its divisors is an integer number (610011061011).

Almost surely, 2^{1220022122021} is an apocalyptic number.

It is an amenable number.

1220022122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220022122021 is an equidigital number, since it uses as much as digits as its factorization.

1220022122021 is an evil number, because the sum of its binary digits is even.

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

Adding to 1220022122021 its reverse (1202212200221), we get a palindrome (2422234322242).

The spelling of 1220022122021 in words is "one trillion, two hundred twenty billion, twenty-two million, one hundred twenty-two thousand, twenty-one".