123021443012412 has 192 divisors, whose sum is σ = 342585149276160. Its totient is φ = 33594791391744.

The previous prime is 123021443012393. The next prime is 123021443012467. The reversal of 123021443012412 is 214210344120321.

It is a happy number.

It is a super-2 number, since 2×123021443012412² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123021443012412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21816177889 + ... + 21816183527.

It is an arithmetic number, because the mean of its divisors is an integer number (1784297652480).

Almost surely, 2^{123021443012412} is an apocalyptic number.

123021443012412 is a gapful number since it is divisible by the number (12) 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 123021443012412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171292574638080).

123021443012412 is an abundant number, since it is smaller than the sum of its proper divisors (219563706263748).

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

123021443012412 is a wasteful number, since it uses less digits than its factorization.

123021443012412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12400 (or 12398 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 123021443012412 its reverse (214210344120321), we get a palindrome (337231787132733).

The spelling of 123021443012412 in words is "one hundred twenty-three trillion, twenty-one billion, four hundred forty-three million, twelve thousand, four hundred twelve".