123920931129 has 8 divisors (see below), whose sum is σ = 174947196960. Its totient is φ = 77754309696.

The previous prime is 123920931097. The next prime is 123920931131. The reversal of 123920931129 is 921139029321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123920931129 - 2⁵ = 123920931097 is a prime.

It is a super-2 number, since 2×123920931129² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123920931929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214911039 + ... + 1214911140.

It is an arithmetic number, because the mean of its divisors is an integer number (21868399620).

Almost surely, 2^123920931129 is an apocalyptic number.

It is an amenable number.

123920931129 is a deficient number, since it is larger than the sum of its proper divisors (51026265831).

123920931129 is a wasteful number, since it uses less digits than its factorization.

123920931129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429822199.

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 123920931129 in words is "one hundred twenty-three billion, nine hundred twenty million, nine hundred thirty-one thousand, one hundred twenty-nine".