102111231 has 32 divisors (see below), whose sum is σ = 150994368. Its totient is φ = 61102080.

The previous prime is 102111203. The next prime is 102111239. The reversal of 102111231 is 132111201.

It is not a de Polignac number, because 102111231 - 2⁵ = 102111199 is a prime.

It is a super-2 number, since 2×102111231² = 20853406992670722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99501 + ... + 100521.

It is an arithmetic number, because the mean of its divisors is an integer number (4718574).

Almost surely, 2^102111231 is an apocalyptic number.

102111231 is a deficient number, since it is larger than the sum of its proper divisors (48883137).

102111231 is a wasteful number, since it uses less digits than its factorization.

102111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 102111231 is about 10105.0101929686. The cubic root of 102111231 is about 467.4026502856.

Adding to 102111231 its reverse (132111201), we get a palindrome (234222432).

The spelling of 102111231 in words is "one hundred two million, one hundred eleven thousand, two hundred thirty-one".