12220200121021 has 2 divisors, whose sum is σ = 12220200121022. Its totient is φ = 12220200121020.

The previous prime is 12220200120983. The next prime is 12220200121081. The reversal of 12220200121021 is 12012100202221.

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., 12181593765796 + 38606355225 = 3490214^2 + 196485^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220200121021 - 2²⁵ = 12220166566589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220200120986 and 12220200121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220200121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110100060510 + 6110100060511.

It is an arithmetic number, because the mean of its divisors is an integer number (6110100060511).

Almost surely, 2^{12220200121021} is an apocalyptic number.

It is an amenable number.

12220200121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220200121021 is an equidigital number, since it uses as much as digits as its factorization.

12220200121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12220200121021 its reverse (12012100202221), we get a palindrome (24232300323242).

The spelling of 12220200121021 in words is "twelve trillion, two hundred twenty billion, two hundred million, one hundred twenty-one thousand, twenty-one".