123021343254021 has 8 divisors (see below), whose sum is σ = 164041291496544. Its totient is φ = 82007811923760.

The previous prime is 123021343253993. The next prime is 123021343254037. The reversal of 123021343254021 is 120452343120321.

It is a happy number.

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

It is not a de Polignac number, because 123021343254021 - 2²⁹ = 123020806383109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021343254071) 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, 1604183331 + ... + 1604260016.

It is an arithmetic number, because the mean of its divisors is an integer number (20505161437068).

Almost surely, 2^{123021343254021} is an apocalyptic number.

It is an amenable number.

123021343254021 is a deficient number, since it is larger than the sum of its proper divisors (41019948242523).

123021343254021 is a wasteful number, since it uses less digits than its factorization.

123021343254021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208456131.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 123021343254021 its reverse (120452343120321), we get a palindrome (243473686374342).

The spelling of 123021343254021 in words is "one hundred twenty-three trillion, twenty-one billion, three hundred forty-three million, two hundred fifty-four thousand, twenty-one".