220200211121021 has 2 divisors, whose sum is σ = 220200211121022. Its totient is φ = 220200211121020.

The previous prime is 220200211120957. The next prime is 220200211121081. The reversal of 220200211121021 is 120121112002022.

220200211121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147550823702500 + 72649387418521 = 12147050^2 + 8523461^2 .

It is a cyclic number.

It is not a de Polignac number, because 220200211121021 - 2⁶ = 220200211120957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220200211121081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110100105560510 + 110100105560511.

It is an arithmetic number, because the mean of its divisors is an integer number (110100105560511).

Almost surely, 2^{220200211121021} is an apocalyptic number.

It is an amenable number.

220200211121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220200211121021 is an equidigital number, since it uses as much as digits as its factorization.

220200211121021 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 17.

Adding to 220200211121021 its reverse (120121112002022), we get a palindrome (340321323123043).

The spelling of 220200211121021 in words is "two hundred twenty trillion, two hundred billion, two hundred eleven million, one hundred twenty-one thousand, twenty-one".