122731129 has 4 divisors (see below), whose sum is σ = 123016320. Its totient is φ = 122445940.

The previous prime is 122731123. The next prime is 122731153. The reversal of 122731129 is 921137221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122731129 - 2⁷ = 122731001 is a prime.

It is a super-2 number, since 2×122731129² = 30125860051229282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122731097 and 122731106.

It is not an unprimeable number, because it can be changed into a prime (122731123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141949 + ... + 142810.

It is an arithmetic number, because the mean of its divisors is an integer number (30754080).

Almost surely, 2^122731129 is an apocalyptic number.

It is an amenable number.

122731129 is a deficient number, since it is larger than the sum of its proper divisors (285191).

122731129 is an equidigital number, since it uses as much as digits as its factorization.

122731129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285190.

The product of its digits is 1512, while the sum is 28.

The square root of 122731129 is about 11078.4082340380. The cubic root of 122731129 is about 496.9563486338.

The spelling of 122731129 in words is "one hundred twenty-two million, seven hundred thirty-one thousand, one hundred twenty-nine".