21222221258311 has 2 divisors, whose sum is σ = 21222221258312. Its totient is φ = 21222221258310.

The previous prime is 21222221258201. The next prime is 21222221258317. The reversal of 21222221258311 is 11385212222212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222221258311 - 2²³ = 21222212869703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222221258317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611110629155 + 10611110629156.

It is an arithmetic number, because the mean of its divisors is an integer number (10611110629156).

Almost surely, 2^{21222221258311} is an apocalyptic number.

21222221258311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222221258311 is an equidigital number, since it uses as much as digits as its factorization.

21222221258311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 34.

The spelling of 21222221258311 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred fifty-eight thousand, three hundred eleven".