25012123110 has 128 divisors (see below), whose sum is σ = 73047744000. Its totient is φ = 6052427136.

The previous prime is 25012123109. The next prime is 25012123153. The reversal of 25012123110 is 1132121052.

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

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, 146701 + ... + 267479.

It is an arithmetic number, because the mean of its divisors is an integer number (570685500).

Almost surely, 2^25012123110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25012123110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36523872000).

25012123110 is an abundant number, since it is smaller than the sum of its proper divisors (48035620890).

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

25012123110 is a wasteful number, since it uses less digits than its factorization.

25012123110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120867 (or 120861 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 25012123110 its reverse (1132121052), we get a palindrome (26144244162).

The spelling of 25012123110 in words is "twenty-five billion, twelve million, one hundred twenty-three thousand, one hundred ten".