122721951 has 24 divisors (see below), whose sum is σ = 187689600. Its totient is φ = 71138320.

The previous prime is 122721899. The next prime is 122721953. The reversal of 122721951 is 159127221.

It is not a de Polignac number, because 122721951 - 2⁶ = 122721887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122721953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1000 + ... + 15698.

It is an arithmetic number, because the mean of its divisors is an integer number (7820400).

Almost surely, 2^122721951 is an apocalyptic number.

122721951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122721951 is a deficient number, since it is larger than the sum of its proper divisors (64967649).

122721951 is a wasteful number, since it uses less digits than its factorization.

122721951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14747 (or 14736 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 122721951 is about 11077.9939971098. The cubic root of 122721951 is about 496.9439606355.

The spelling of 122721951 in words is "one hundred twenty-two million, seven hundred twenty-one thousand, nine hundred fifty-one".