122721705894 has 16 divisors (see below), whose sum is σ = 252077017968. Its totient is φ = 39801634272.

The previous prime is 122721705881. The next prime is 122721705929. The reversal of 122721705894 is 498507127221.

122721705894 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 276400017 + ... + 276400460.

It is an arithmetic number, because the mean of its divisors is an integer number (15754813623).

Almost surely, 2^122721705894 is an apocalyptic number.

122721705894 is an abundant number, since it is smaller than the sum of its proper divisors (129355312074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122721705894 is a wasteful number, since it uses less digits than its factorization.

122721705894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552800519.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 122721705894 in words is "one hundred twenty-two billion, seven hundred twenty-one million, seven hundred five thousand, eight hundred ninety-four".