102155243240105 has 16 divisors (see below), whose sum is σ = 133776822063744. Its totient is φ = 74268988010880.

The previous prime is 102155243240023. The next prime is 102155243240143. The reversal of 102155243240105 is 501042342551201.

It is not a de Polignac number, because 102155243240105 - 2¹⁸ = 102155242977961 is a prime.

It is a super-2 number, since 2×102155243240105² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321519092 + ... + 321836661.

It is an arithmetic number, because the mean of its divisors is an integer number (8361051378984).

Almost surely, 2^{102155243240105} is an apocalyptic number.

It is an amenable number.

102155243240105 is a deficient number, since it is larger than the sum of its proper divisors (31621578823639).

102155243240105 is a wasteful number, since it uses less digits than its factorization.

102155243240105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643358656.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 102155243240105 its reverse (501042342551201), we get a palindrome (603197585791306).

The spelling of 102155243240105 in words is "one hundred two trillion, one hundred fifty-five billion, two hundred forty-three million, two hundred forty thousand, one hundred five".