102011431 has 4 divisors (see below), whose sum is σ = 102637432. Its totient is φ = 101385432.

The previous prime is 102011423. The next prime is 102011443. The reversal of 102011431 is 134110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134110201 = 179 ⋅749219.

It is a cyclic number.

It is not a de Polignac number, because 102011431 - 2³ = 102011423 is a prime.

It is a super-2 number, since 2×102011431² = 20812664109335522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011411) 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, 312756 + ... + 313081.

It is an arithmetic number, because the mean of its divisors is an integer number (25659358).

Almost surely, 2^102011431 is an apocalyptic number.

102011431 is a deficient number, since it is larger than the sum of its proper divisors (626001).

102011431 is an equidigital number, since it uses as much as digits as its factorization.

102011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626000.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102011431 is about 10100.0708413357. The cubic root of 102011431 is about 467.2503262325.

Adding to 102011431 its reverse (134110201), we get a palindrome (236121632).

The spelling of 102011431 in words is "one hundred two million, eleven thousand, four hundred thirty-one".