122065621 has 2 divisors, whose sum is σ = 122065622. Its totient is φ = 122065620.

The previous prime is 122065613. The next prime is 122065637. The reversal of 122065621 is 126560221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 16695396 = 10265^2 + 4086^2 .

It is an emirp because it is prime and its reverse (126560221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122065621 - 2³ = 122065613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122065421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61032810 + 61032811.

It is an arithmetic number, because the mean of its divisors is an integer number (61032811).

Almost surely, 2^122065621 is an apocalyptic number.

It is an amenable number.

122065621 is a deficient number, since it is larger than the sum of its proper divisors (1).

122065621 is an equidigital number, since it uses as much as digits as its factorization.

122065621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 122065621 is about 11048.3311409461. The cubic root of 122065621 is about 496.0564736361.

The spelling of 122065621 in words is "one hundred twenty-two million, sixty-five thousand, six hundred twenty-one".