111431002 has 4 divisors (see below), whose sum is σ = 167146506. Its totient is φ = 55715500.

The previous prime is 111430993. The next prime is 111431003. The reversal of 111431002 is 200134111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200134111 = 487 ⋅410953.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 44502241 = 8181^2 + 6671^2 .

It is not an unprimeable number, because it can be changed into a prime (111431003) 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 as a sum of consecutive naturals, namely, 27857749 + ... + 27857752.

Almost surely, 2^111431002 is an apocalyptic number.

111431002 is a deficient number, since it is larger than the sum of its proper divisors (55715504).

111431002 is an equidigital number, since it uses as much as digits as its factorization.

111431002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55715503.

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

The square root of 111431002 is about 10556.0883853822. The cubic root of 111431002 is about 481.2107772160.

Adding to 111431002 its reverse (200134111), we get a palindrome (311565113).

The spelling of 111431002 in words is "one hundred eleven million, four hundred thirty-one thousand, two".