123072124221 has 12 divisors (see below), whose sum is σ = 184354951872. Its totient is φ = 82048082652.

The previous prime is 123072124181. The next prime is 123072124247. The reversal of 123072124221 is 122421270321.

It is a happy number.

123072124221 is a `hidden beast` number, since 1 + 23 + 0 + 7 + 212 + 422 + 1 = 666.

It is not a de Polignac number, because 123072124221 - 2⁷ = 123072124093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123072194221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 253234581 + ... + 253235066.

It is an arithmetic number, because the mean of its divisors is an integer number (15362912656).

Almost surely, 2^123072124221 is an apocalyptic number.

It is an amenable number.

123072124221 is a deficient number, since it is larger than the sum of its proper divisors (61282827651).

123072124221 is an frugal number, since it uses more digits than its factorization.

123072124221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506469662 (or 506469650 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 123072124221 its reverse (122421270321), we get a palindrome (245493394542).

The spelling of 123072124221 in words is "one hundred twenty-three billion, seventy-two million, one hundred twenty-four thousand, two hundred twenty-one".