113222221421 has 2 divisors, whose sum is σ = 113222221422. Its totient is φ = 113222221420.

The previous prime is 113222221327. The next prime is 113222221423. The reversal of 113222221421 is 124122222311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97212380521 + 16009840900 = 311789^2 + 126530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113222221421 is a prime.

Together with 113222221423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113222221423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56611110710 + 56611110711.

It is an arithmetic number, because the mean of its divisors is an integer number (56611110711).

Almost surely, 2^113222221421 is an apocalyptic number.

It is an amenable number.

113222221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

113222221421 is an equidigital number, since it uses as much as digits as its factorization.

113222221421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

Adding to 113222221421 its reverse (124122222311), we get a palindrome (237344443732).

The spelling of 113222221421 in words is "one hundred thirteen billion, two hundred twenty-two million, two hundred twenty-one thousand, four hundred twenty-one".