122221951 has 2 divisors, whose sum is σ = 122221952. Its totient is φ = 122221950.

The previous prime is 122221937. The next prime is 122221987. The reversal of 122221951 is 159122221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122221951 - 2¹⁹ = 121697663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122221901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110975 + 61110976.

It is an arithmetic number, because the mean of its divisors is an integer number (61110976).

Almost surely, 2^122221951 is an apocalyptic number.

122221951 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221951 is an equidigital number, since it uses as much as digits as its factorization.

122221951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 122221951 is about 11055.4037013580. The cubic root of 122221951 is about 496.2681505627.

The spelling of 122221951 in words is "one hundred twenty-two million, two hundred twenty-one thousand, nine hundred fifty-one".