102155243240125 has 24 divisors (see below), whose sum is σ = 129940597037160. Its totient is φ = 80182228380800.

The previous prime is 102155243240023. The next prime is 102155243240143. The reversal of 102155243240125 is 521042342551201.

It can be written as a sum of positive squares in 12 ways, for example, as 80484905510244 + 21670337729881 = 8971338^2 + 4655141^2 .

It is not a de Polignac number, because 102155243240125 - 2¹³ = 102155243231933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145117360 + ... + 145819609.

It is an arithmetic number, because the mean of its divisors is an integer number (5414191543215).

Almost surely, 2^{102155243240125} is an apocalyptic number.

It is an amenable number.

102155243240125 is a deficient number, since it is larger than the sum of its proper divisors (27785353797035).

102155243240125 is an frugal number, since it uses more digits than its factorization.

102155243240125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290937090 (or 290937027 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 102155243240125 its reverse (521042342551201), we get a palindrome (623197585791326).

The spelling of 102155243240125 in words is "one hundred two trillion, one hundred fifty-five billion, two hundred forty-three million, two hundred forty thousand, one hundred twenty-five".