102101210525 has 12 divisors (see below), whose sum is σ = 126694516032. Its totient is φ = 81623539440.

The previous prime is 102101210521. The next prime is 102101210539. The reversal of 102101210525 is 525012101201.

It is not a de Polignac number, because 102101210525 - 2² = 102101210521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102101210497 and 102101210506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101210521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1399439 + ... + 1470588.

It is an arithmetic number, because the mean of its divisors is an integer number (10557876336).

Almost surely, 2^102101210525 is an apocalyptic number.

It is an amenable number.

102101210525 is a deficient number, since it is larger than the sum of its proper divisors (24593305507).

102101210525 is a wasteful number, since it uses less digits than its factorization.

102101210525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871460 (or 2871455 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 102101210525 its reverse (525012101201), we get a palindrome (627113311726).

The spelling of 102101210525 in words is "one hundred two billion, one hundred one million, two hundred ten thousand, five hundred twenty-five".