123576704221 has 4 divisors (see below), whose sum is σ = 123606124444. Its totient is φ = 123547284000.

The previous prime is 123576704219. The next prime is 123576704257. The reversal of 123576704221 is 122407675321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122407675321 = 3881 ⋅31540241.

It can be written as a sum of positive squares in 2 ways, for example, as 59258164900 + 64318539321 = 243430^2 + 253611^2 .

It is a cyclic number.

It is not a de Polignac number, because 123576704221 - 2¹ = 123576704219 is a prime.

It is a super-2 number, since 2×123576704221² (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 (123576204221) 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, 14703810 + ... + 14712211.

It is an arithmetic number, because the mean of its divisors is an integer number (30901531111).

Almost surely, 2^123576704221 is an apocalyptic number.

It is an amenable number.

123576704221 is a deficient number, since it is larger than the sum of its proper divisors (29420223).

123576704221 is an equidigital number, since it uses as much as digits as its factorization.

123576704221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29420222.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 123576704221 in words is "one hundred twenty-three billion, five hundred seventy-six million, seven hundred four thousand, two hundred twenty-one".