25012123101 has 24 divisors (see below), whose sum is σ = 41475033600. Its totient is φ = 14228541216.

The previous prime is 25012123093. The next prime is 25012123109. The reversal of 25012123101 is 10132121052.

It is an interprime number because it is at equal distance from previous prime (25012123093) and next prime (25012123109).

It is not a de Polignac number, because 25012123101 - 2³ = 25012123093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25012123109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876126 + ... + 904223.

It is an arithmetic number, because the mean of its divisors is an integer number (1728126400).

Almost surely, 2^25012123101 is an apocalyptic number.

25012123101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25012123101 is a deficient number, since it is larger than the sum of its proper divisors (16462910499).

25012123101 is a wasteful number, since it uses less digits than its factorization.

25012123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780585 (or 1780582 counting only the distinct ones).

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

Adding to 25012123101 its reverse (10132121052), we get a palindrome (35144244153).

The spelling of 25012123101 in words is "twenty-five billion, twelve million, one hundred twenty-three thousand, one hundred one".