122521307 has 2 divisors, whose sum is σ = 122521308. Its totient is φ = 122521306.

The previous prime is 122521283. The next prime is 122521309. The reversal of 122521307 is 703125221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (703125221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122521307 - 2⁸ = 122521051 is a prime.

It is a super-2 number, since 2×122521307² = 30022941337976498, which contains 22 as substring.

Together with 122521309, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122521309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61260653 + 61260654.

It is an arithmetic number, because the mean of its divisors is an integer number (61260654).

Almost surely, 2^122521307 is an apocalyptic number.

122521307 is a deficient number, since it is larger than the sum of its proper divisors (1).

122521307 is an equidigital number, since it uses as much as digits as its factorization.

122521307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 122521307 is about 11068.9343208820. The cubic root of 122521307 is about 496.6729870723.

Adding to 122521307 its reverse (703125221), we get a palindrome (825646528).

The spelling of 122521307 in words is "one hundred twenty-two million, five hundred twenty-one thousand, three hundred seven".