123012232121220 has 384 divisors, whose sum is σ = 403858453340160. Its totient is φ = 27714860052480.

The previous prime is 123012232121197. The next prime is 123012232121287. The reversal of 123012232121220 is 22121232210321.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 61602097 + ... + 63567623.

It is an arithmetic number, because the mean of its divisors is an integer number (1051714722240).

Almost surely, 2^{123012232121220} is an apocalyptic number.

123012232121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123012232121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201929226670080).

123012232121220 is an abundant number, since it is smaller than the sum of its proper divisors (280846221218940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123012232121220 is a wasteful number, since it uses less digits than its factorization.

123012232121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965715 (or 1965713 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 123012232121220 its reverse (22121232210321), we get a palindrome (145133464331541).

The spelling of 123012232121220 in words is "one hundred twenty-three trillion, twelve billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty".