122311621 has 2 divisors, whose sum is σ = 122311622. Its totient is φ = 122311620.

The previous prime is 122311619. The next prime is 122311633. The reversal of 122311621 is 126113221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122213025 + 98596 = 11055^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 122311621 - 2¹ = 122311619 is a prime.

Together with 122311619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122311691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61155810 + 61155811.

It is an arithmetic number, because the mean of its divisors is an integer number (61155811).

Almost surely, 2^122311621 is an apocalyptic number.

It is an amenable number.

122311621 is a deficient number, since it is larger than the sum of its proper divisors (1).

122311621 is an equidigital number, since it uses as much as digits as its factorization.

122311621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

The square root of 122311621 is about 11059.4584406290. The cubic root of 122311621 is about 496.3894857957.

Adding to 122311621 its reverse (126113221), we get a palindrome (248424842).

The spelling of 122311621 in words is "one hundred twenty-two million, three hundred eleven thousand, six hundred twenty-one".