123021113130 has 96 divisors (see below), whose sum is σ = 321509929104. Its totient is φ = 32636141568.

The previous prime is 123021113119. The next prime is 123021113141. The reversal of 123021113130 is 31311120321.

It is an interprime number because it is at equal distance from previous prime (123021113119) and next prime (123021113141).

It can be written as a sum of positive squares in 8 ways, for example, as 30204006849 + 92817106281 = 173793^2 + 304659^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35584362 + ... + 35587818.

Almost surely, 2^123021113130 is an apocalyptic number.

123021113130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123021113130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160754964552).

123021113130 is an abundant number, since it is smaller than the sum of its proper divisors (198488815974).

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

123021113130 is a wasteful number, since it uses less digits than its factorization.

123021113130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400 (or 5397 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123021113130 its reverse (31311120321), we get a palindrome (154332233451).

The spelling of 123021113130 in words is "one hundred twenty-three billion, twenty-one million, one hundred thirteen thousand, one hundred thirty".