2201022121021 has 2 divisors, whose sum is σ = 2201022121022. Its totient is φ = 2201022121020.

The previous prime is 2201022120991. The next prime is 2201022121027. The reversal of 2201022121021 is 1201212201022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2183759840025 + 17262280996 = 1477755^2 + 131386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201022121021 - 2¹¹ = 2201022118973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201022120986 and 2201022121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201022121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100511060510 + 1100511060511.

It is an arithmetic number, because the mean of its divisors is an integer number (1100511060511).

Almost surely, 2^{2201022121021} is an apocalyptic number.

It is an amenable number.

2201022121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201022121021 is an equidigital number, since it uses as much as digits as its factorization.

2201022121021 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 2201022121021 its reverse (1201212201022), we get a palindrome (3402234322043).

The spelling of 2201022121021 in words is "two trillion, two hundred one billion, twenty-two million, one hundred twenty-one thousand, twenty-one".