25012123102 has 16 divisors (see below), whose sum is σ = 38010628800. Its totient is φ = 12342983328.

The previous prime is 25012123093. The next prime is 25012123109. The reversal of 25012123102 is 20132121052.

It is a self number, because there is not a number n which added to its sum of digits gives 25012123102.

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 7 ways as a sum of consecutive naturals, for example, 220518 + ... + 314089.

It is an arithmetic number, because the mean of its divisors is an integer number (2375664300).

Almost surely, 2^25012123102 is an apocalyptic number.

25012123102 is a deficient number, since it is larger than the sum of its proper divisors (12998505698).

25012123102 is a wasteful number, since it uses less digits than its factorization.

25012123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534915.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 25012123102 its reverse (20132121052), we get a palindrome (45144244154).

The spelling of 25012123102 in words is "twenty-five billion, twelve million, one hundred twenty-three thousand, one hundred two".