123121321002121 has 8 divisors (see below), whose sum is σ = 132593468192640. Its totient is φ = 113649356146512.

The previous prime is 123121321002089. The next prime is 123121321002139. The reversal of 123121321002121 is 121200123121321.

It is a happy number.

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 123121321002121 - 2⁵ = 123121321002089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123121321002092 and 123121321002101.

It is not an unprimeable number, because it can be changed into a prime (123121321002161) 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, 44179681 + ... + 46883758.

It is an arithmetic number, because the mean of its divisors is an integer number (16574183524080).

Almost surely, 2^{123121321002121} is an apocalyptic number.

It is an amenable number.

123121321002121 is a deficient number, since it is larger than the sum of its proper divisors (9472147190519).

123121321002121 is a wasteful number, since it uses less digits than its factorization.

123121321002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91167455.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 123121321002121 its reverse (121200123121321), we get a palindrome (244321444123442).

The spelling of 123121321002121 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, three hundred twenty-one million, two thousand, one hundred twenty-one".