220002212050021 has 2 divisors, whose sum is σ = 220002212050022. Its totient is φ = 220002212050020.

The previous prime is 220002212050001. The next prime is 220002212050069. The reversal of 220002212050021 is 120050212200022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199857285393921 + 20144926656100 = 14137089^2 + 4488310^2 .

It is a cyclic number.

It is not a de Polignac number, because 220002212050021 - 2⁵ = 220002212049989 is a prime.

It is a super-2 number, since 2×220002212050021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220002212050001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110001106025010 + 110001106025011.

It is an arithmetic number, because the mean of its divisors is an integer number (110001106025011).

Almost surely, 2^{220002212050021} is an apocalyptic number.

It is an amenable number.

220002212050021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220002212050021 is an equidigital number, since it uses as much as digits as its factorization.

220002212050021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 220002212050021 its reverse (120050212200022), we get a palindrome (340052424250043).

The spelling of 220002212050021 in words is "two hundred twenty trillion, two billion, two hundred twelve million, fifty thousand, twenty-one".