122621129 has 4 divisors (see below), whose sum is σ = 124098576. Its totient is φ = 121143684.

The previous prime is 122621123. The next prime is 122621137. The reversal of 122621129 is 921126221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 921126221 = 10313 ⋅89317.

It is a cyclic number.

It is not a de Polignac number, because 122621129 - 2⁴ = 122621113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122621098 and 122621107.

It is not an unprimeable number, because it can be changed into a prime (122621123) 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, 738599 + ... + 738764.

It is an arithmetic number, because the mean of its divisors is an integer number (31024644).

Almost surely, 2^122621129 is an apocalyptic number.

It is an amenable number.

122621129 is a deficient number, since it is larger than the sum of its proper divisors (1477447).

122621129 is an equidigital number, since it uses as much as digits as its factorization.

122621129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477446.

The product of its digits is 864, while the sum is 26.

The square root of 122621129 is about 11073.4425089942. The cubic root of 122621129 is about 496.8078355427.

The spelling of 122621129 in words is "one hundred twenty-two million, six hundred twenty-one thousand, one hundred twenty-nine".