122928139501 has 4 divisors (see below), whose sum is σ = 129398041600. Its totient is φ = 116458237404.

The previous prime is 122928139457. The next prime is 122928139511. The reversal of 122928139501 is 105931829221.

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: 105931829221 = 14783 ⋅7165787.

It is not a de Polignac number, because 122928139501 - 2²⁹ = 122391268589 is a prime.

It is a super-2 number, since 2×122928139501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122928139511) 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, 3234951021 + ... + 3234951058.

It is an arithmetic number, because the mean of its divisors is an integer number (32349510400).

Almost surely, 2^122928139501 is an apocalyptic number.

It is an amenable number.

122928139501 is a deficient number, since it is larger than the sum of its proper divisors (6469902099).

122928139501 is an equidigital number, since it uses as much as digits as its factorization.

122928139501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6469902098.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 122928139501 in words is "one hundred twenty-two billion, nine hundred twenty-eight million, one hundred thirty-nine thousand, five hundred one".