123001234312 has 64 divisors (see below), whose sum is σ = 261755043840. Its totient is φ = 53679931200.

The previous prime is 123001234283. The next prime is 123001234337. The reversal of 123001234312 is 213432100321.

It is a super-2 number, since 2×123001234312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168943 + ... + 523969.

It is an arithmetic number, because the mean of its divisors is an integer number (4089922560).

Almost surely, 2^123001234312 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 123001234312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130877521920).

123001234312 is an abundant number, since it is smaller than the sum of its proper divisors (138753809528).

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

123001234312 is a wasteful number, since it uses less digits than its factorization.

123001234312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355202 (or 355198 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123001234312 its reverse (213432100321), we get a palindrome (336433334633).

The spelling of 123001234312 in words is "one hundred twenty-three billion, one million, two hundred thirty-four thousand, three hundred twelve".