101191955 has 4 divisors (see below), whose sum is σ = 121430352. Its totient is φ = 80953560.

The previous prime is 101191907. The next prime is 101191997. The reversal of 101191955 is 559191101.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 101191955 - 2¹⁶ = 101126419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10119191 + ... + 10119200.

It is an arithmetic number, because the mean of its divisors is an integer number (30357588).

Almost surely, 2^101191955 is an apocalyptic number.

101191955 is a deficient number, since it is larger than the sum of its proper divisors (20238397).

101191955 is an equidigital number, since it uses as much as digits as its factorization.

101191955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20238396.

The product of its (nonzero) digits is 2025, while the sum is 32.

The square root of 101191955 is about 10059.4212060138. The cubic root of 101191955 is about 465.9957925412.

The spelling of 101191955 in words is "one hundred one million, one hundred ninety-one thousand, nine hundred fifty-five".