123021022121 has 8 divisors (see below), whose sum is σ = 130268035584. Its totient is φ = 115775173440.

The previous prime is 123021022099. The next prime is 123021022127. The reversal of 123021022121 is 121220120321.

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

It is a de Polignac number, because none of the positive numbers 2^k-123021022121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123021022121.

It is not an unprimeable number, because it can be changed into a prime (123021022127) 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, 68885 + ... + 500786.

It is an arithmetic number, because the mean of its divisors is an integer number (16283504448).

Almost surely, 2^123021022121 is an apocalyptic number.

It is an amenable number.

123021022121 is a deficient number, since it is larger than the sum of its proper divisors (7247013463).

123021022121 is a wasteful number, since it uses less digits than its factorization.

123021022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582391.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 123021022121 its reverse (121220120321), we get a palindrome (244241142442).

The spelling of 123021022121 in words is "one hundred twenty-three billion, twenty-one million, twenty-two thousand, one hundred twenty-one".