123531511501002 has 128 divisors (see below), whose sum is σ = 281711477283840. Its totient is φ = 35768480168960.

The previous prime is 123531511500923. The next prime is 123531511501043. The reversal of 123531511501002 is 200105115135321.

123531511501002 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 199778953 + ... + 200396339.

It is an arithmetic number, because the mean of its divisors is an integer number (2200870916280).

Almost surely, 2^{123531511501002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123531511501002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140855738641920).

123531511501002 is an abundant number, since it is smaller than the sum of its proper divisors (158179965782838).

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

123531511501002 is a wasteful number, since it uses less digits than its factorization.

123531511501002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618516.

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 123531511501002 its reverse (200105115135321), we get a palindrome (323636626636323).

The spelling of 123531511501002 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, five hundred eleven million, five hundred one thousand, two".