222013020421 has 2 divisors, whose sum is σ = 222013020422. Its totient is φ = 222013020420.

The previous prime is 222013020377. The next prime is 222013020431. The reversal of 222013020421 is 124020310222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174795903396 + 47217117025 = 418086^2 + 217295^2 .

It is a cyclic number.

It is not a de Polignac number, because 222013020421 - 2¹¹ = 222013018373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222013020431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111006510210 + 111006510211.

It is an arithmetic number, because the mean of its divisors is an integer number (111006510211).

Almost surely, 2^222013020421 is an apocalyptic number.

It is an amenable number.

222013020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222013020421 is an equidigital number, since it uses as much as digits as its factorization.

222013020421 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 222013020421 its reverse (124020310222), we get a palindrome (346033330643).

The spelling of 222013020421 in words is "two hundred twenty-two billion, thirteen million, twenty thousand, four hundred twenty-one".