123721428241 has 8 divisors (see below), whose sum is σ = 131222337120. Its totient is φ = 116245316928.

The previous prime is 123721428239. The next prime is 123721428269. The reversal of 123721428241 is 142824127321.

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

It is a cyclic number.

It is not a de Polignac number, because 123721428241 - 2¹ = 123721428239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123721428241.

It is not an unprimeable number, because it can be changed into a prime (123721428841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6189111 + ... + 6209068.

It is an arithmetic number, because the mean of its divisors is an integer number (16402792140).

Almost surely, 2^123721428241 is an apocalyptic number.

It is an amenable number.

123721428241 is a deficient number, since it is larger than the sum of its proper divisors (7500908879).

123721428241 is a wasteful number, since it uses less digits than its factorization.

123721428241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398783.

The product of its digits is 43008, while the sum is 37.

The spelling of 123721428241 in words is "one hundred twenty-three billion, seven hundred twenty-one million, four hundred twenty-eight thousand, two hundred forty-one".