101551123 has 4 divisors (see below), whose sum is σ = 101660440. Its totient is φ = 101441808.

The previous prime is 101551117. The next prime is 101551139. The reversal of 101551123 is 321155101.

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

It is a cyclic number.

It is not a de Polignac number, because 101551123 - 2⁵ = 101551091 is a prime.

It is a super-2 number, since 2×101551123² = 20625261165122258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101551123.

It is not an unprimeable number, because it can be changed into a prime (101551193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53253 + ... + 55126.

It is an arithmetic number, because the mean of its divisors is an integer number (25415110).

Almost surely, 2^101551123 is an apocalyptic number.

101551123 is a deficient number, since it is larger than the sum of its proper divisors (109317).

101551123 is an equidigital number, since it uses as much as digits as its factorization.

101551123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109316.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 101551123 is about 10077.2577122946. The cubic root of 101551123 is about 466.5464725036.

The spelling of 101551123 in words is "one hundred one million, five hundred fifty-one thousand, one hundred twenty-three".