31112201143 has 4 divisors (see below), whose sum is σ = 32942330640. Its totient is φ = 29282071648.

The previous prime is 31112201119. The next prime is 31112201147. The reversal of 31112201143 is 34110221113.

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 31112201143 - 2¹⁷ = 31112070071 is a prime.

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 31112201143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112201147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915064723 + ... + 915064756.

It is an arithmetic number, because the mean of its divisors is an integer number (8235582660).

Almost surely, 2^31112201143 is an apocalyptic number.

31112201143 is a deficient number, since it is larger than the sum of its proper divisors (1830129497).

31112201143 is a wasteful number, since it uses less digits than its factorization.

31112201143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830129496.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31112201143 its reverse (34110221113), we get a palindrome (65222422256).

The spelling of 31112201143 in words is "thirty-one billion, one hundred twelve million, two hundred one thousand, one hundred forty-three".