123420142121 has 8 divisors (see below), whose sum is σ = 124977562944. Its totient is φ = 121869628560.

The previous prime is 123420142099. The next prime is 123420142123. The reversal of 123420142121 is 121241024321.

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 123420142121 - 2⁶ = 123420142057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123420142123) 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, 1690850 + ... + 1762331.

It is an arithmetic number, because the mean of its divisors is an integer number (15622195368).

Almost surely, 2^123420142121 is an apocalyptic number.

It is an amenable number.

123420142121 is a deficient number, since it is larger than the sum of its proper divisors (1557420823).

123420142121 is a wasteful number, since it uses less digits than its factorization.

123420142121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453631.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 123420142121 its reverse (121241024321), we get a palindrome (244661166442).

The spelling of 123420142121 in words is "one hundred twenty-three billion, four hundred twenty million, one hundred forty-two thousand, one hundred twenty-one".