123012233221 has 4 divisors (see below), whose sum is σ = 123013488672. Its totient is φ = 123010977772.

The previous prime is 123012233209. The next prime is 123012233237. The reversal of 123012233221 is 122332210321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122332210321 = 157 ⋅779186053.

It is a cyclic number.

It is not a de Polignac number, because 123012233221 - 2¹⁵ = 123012200453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123012233192 and 123012233201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012233021) 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, 467041 + ... + 681286.

It is an arithmetic number, because the mean of its divisors is an integer number (30753372168).

Almost surely, 2^123012233221 is an apocalyptic number.

It is an amenable number.

123012233221 is a deficient number, since it is larger than the sum of its proper divisors (1255451).

123012233221 is a wasteful number, since it uses less digits than its factorization.

123012233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255450.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123012233221 its reverse (122332210321), we get a palindrome (245344443542).

The spelling of 123012233221 in words is "one hundred twenty-three billion, twelve million, two hundred thirty-three thousand, two hundred twenty-one".