31400321111 has 4 divisors (see below), whose sum is σ = 31436126232. Its totient is φ = 31364515992.

The previous prime is 31400321089. The next prime is 31400321129. The reversal of 31400321111 is 11112300413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112300413 = 43 ⋅258425591.

It is a cyclic number.

It is not a de Polignac number, because 31400321111 - 2⁶ = 31400321047 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 31400321111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400321411) 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, 17901245 + ... + 17902998.

It is an arithmetic number, because the mean of its divisors is an integer number (7859031558).

Almost surely, 2^31400321111 is an apocalyptic number.

31400321111 is a deficient number, since it is larger than the sum of its proper divisors (35805121).

31400321111 is an equidigital number, since it uses as much as digits as its factorization.

31400321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35805120.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31400321111 its reverse (11112300413), we get a palindrome (42512621524).

The spelling of 31400321111 in words is "thirty-one billion, four hundred million, three hundred twenty-one thousand, one hundred eleven".