123251013242420 has 96 divisors (see below), whose sum is σ = 296938144774656. Its totient is φ = 42095257459200.

The previous prime is 123251013242411. The next prime is 123251013242429. The reversal of 123251013242420 is 24242310152321.

It is an interprime number because it is at equal distance from previous prime (123251013242411) and next prime (123251013242429).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123251013242429) 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, 1466167190 + ... + 1466251250.

It is an arithmetic number, because the mean of its divisors is an integer number (3093105674736).

Almost surely, 2^{123251013242420} is an apocalyptic number.

123251013242420 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 123251013242420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148469072387328).

123251013242420 is an abundant number, since it is smaller than the sum of its proper divisors (173687131532236).

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

123251013242420 is a wasteful number, since it uses less digits than its factorization.

123251013242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124161 (or 124159 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 123251013242420 its reverse (24242310152321), we get a palindrome (147493323394741).

The spelling of 123251013242420 in words is "one hundred twenty-three trillion, two hundred fifty-one billion, thirteen million, two hundred forty-two thousand, four hundred twenty".