123021404121 has 32 divisors (see below), whose sum is σ = 211100000256. Its totient is φ = 61845696000.

The previous prime is 123021404119. The next prime is 123021404131. The reversal of 123021404121 is 121404120321.

It is not a de Polignac number, because 123021404121 - 2¹ = 123021404119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (123021404131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8582520 + ... + 8596841.

It is an arithmetic number, because the mean of its divisors is an integer number (6596875008).

Almost surely, 2^123021404121 is an apocalyptic number.

123021404121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123021404121 is a deficient number, since it is larger than the sum of its proper divisors (88078596135).

123021404121 is a wasteful number, since it uses less digits than its factorization.

123021404121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17179413.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 123021404121 its reverse (121404120321), we get a palindrome (244425524442).

The spelling of 123021404121 in words is "one hundred twenty-three billion, twenty-one million, four hundred four thousand, one hundred twenty-one".