31472121111 has 16 divisors (see below), whose sum is σ = 42505855488. Its totient is φ = 20711297600.

The previous prime is 31472121091. The next prime is 31472121167. The reversal of 31472121111 is 11112127413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31472121111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31472122111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84255 + ... + 264656.

It is an arithmetic number, because the mean of its divisors is an integer number (2656615968).

Almost surely, 2^31472121111 is an apocalyptic number.

31472121111 is a deficient number, since it is larger than the sum of its proper divisors (11033734377).

31472121111 is a wasteful number, since it uses less digits than its factorization.

31472121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349302.

The product of its digits is 336, while the sum is 24.

Adding to 31472121111 its reverse (11112127413), we get a palindrome (42584248524).

The spelling of 31472121111 in words is "thirty-one billion, four hundred seventy-two million, one hundred twenty-one thousand, one hundred eleven".