123012132231212 has 72 divisors (see below), whose sum is σ = 255301218464544. Its totient is φ = 51692583790848.

The previous prime is 123012132231169. The next prime is 123012132231221. The reversal of 123012132231212 is 212132231210321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13009088 + ... + 20377944.

It is an arithmetic number, because the mean of its divisors is an integer number (3545850256452).

Almost surely, 2^{123012132231212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123012132231212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127650609232272).

123012132231212 is an abundant number, since it is smaller than the sum of its proper divisors (132289086233332).

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

123012132231212 is a wasteful number, since it uses less digits than its factorization.

123012132231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370535 (or 7370526 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 123012132231212 its reverse (212132231210321), we get a palindrome (335144363441533).

The spelling of 123012132231212 in words is "one hundred twenty-three trillion, twelve billion, one hundred thirty-two million, two hundred thirty-one thousand, two hundred twelve".