220200220621 has 2 divisors, whose sum is σ = 220200220622. Its totient is φ = 220200220620.

The previous prime is 220200220589. The next prime is 220200220661. The reversal of 220200220621 is 126022002022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147402244900 + 72797975721 = 383930^2 + 269811^2 .

It is a cyclic number.

It is not a de Polignac number, because 220200220621 - 2⁵ = 220200220589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220200220661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110100110310 + 110100110311.

It is an arithmetic number, because the mean of its divisors is an integer number (110100110311).

Almost surely, 2^220200220621 is an apocalyptic number.

It is an amenable number.

220200220621 is a deficient number, since it is larger than the sum of its proper divisors (1).

220200220621 is an equidigital number, since it uses as much as digits as its factorization.

220200220621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 220200220621 its reverse (126022002022), we get a palindrome (346222222643).

The spelling of 220200220621 in words is "two hundred twenty billion, two hundred million, two hundred twenty thousand, six hundred twenty-one".