102155101 has 4 divisors (see below), whose sum is σ = 103679872. Its totient is φ = 100630332.

The previous prime is 102155099. The next prime is 102155129. The reversal of 102155101 is 101551201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102155101 - 2¹ = 102155099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102155161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762285 + ... + 762418.

It is an arithmetic number, because the mean of its divisors is an integer number (25919968).

Almost surely, 2^102155101 is an apocalyptic number.

It is an amenable number.

102155101 is a deficient number, since it is larger than the sum of its proper divisors (1524771).

102155101 is an equidigital number, since it uses as much as digits as its factorization.

102155101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524770.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 102155101 is about 10107.1806652498. The cubic root of 102155101 is about 467.4695773620.

The spelling of 102155101 in words is "one hundred two million, one hundred fifty-five thousand, one hundred one".