123345373621 has 8 divisors (see below), whose sum is σ = 130621128984. Its totient is φ = 116071856640.

The previous prime is 123345373609. The next prime is 123345373643. The reversal of 123345373621 is 126373543321.

It can be written as a sum of positive squares in 4 ways, for example, as 100926300721 + 22419072900 = 317689^2 + 149730^2 .

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 123345373621 - 2¹⁹ = 123344849333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123345373601) 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, 445470 + ... + 667183.

It is an arithmetic number, because the mean of its divisors is an integer number (16327641123).

Almost surely, 2^123345373621 is an apocalyptic number.

It is an amenable number.

123345373621 is a deficient number, since it is larger than the sum of its proper divisors (7275755363).

123345373621 is a wasteful number, since it uses less digits than its factorization.

123345373621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119191.

The product of its digits is 272160, while the sum is 40.

The spelling of 123345373621 in words is "one hundred twenty-three billion, three hundred forty-five million, three hundred seventy-three thousand, six hundred twenty-one".