101131123 has 4 divisors (see below), whose sum is σ = 101191608. Its totient is φ = 101070640.

The previous prime is 101131099. The next prime is 101131153. The reversal of 101131123 is 321131101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321131101 = 3457 ⋅92893.

It is a cyclic number.

It is not a de Polignac number, because 101131123 - 2¹⁷ = 101000051 is a prime.

It is a super-2 number, since 2×101131123² = 20455008078482258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101131153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27661 + ... + 31102.

It is an arithmetic number, because the mean of its divisors is an integer number (25297902).

Almost surely, 2^101131123 is an apocalyptic number.

101131123 is a deficient number, since it is larger than the sum of its proper divisors (60485).

101131123 is an equidigital number, since it uses as much as digits as its factorization.

101131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60484.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 101131123 is about 10056.3971182526. The cubic root of 101131123 is about 465.9023953328.

Adding to 101131123 its reverse (321131101), we get a palindrome (422262224).

It can be divided in two parts, 10113 and 1123, that added together give a square (11236 = 106²).

The spelling of 101131123 in words is "one hundred one million, one hundred thirty-one thousand, one hundred twenty-three".