31421232112 has 40 divisors (see below), whose sum is σ = 61211082240. Its totient is φ = 15624934080.

The previous prime is 31421232109. The next prime is 31421232151. The reversal of 31421232112 is 21123212413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6678753 + ... + 6683455.

It is an arithmetic number, because the mean of its divisors is an integer number (1530277056).

Almost surely, 2^31421232112 is an apocalyptic number.

It is an amenable number.

31421232112 is a deficient number, since it is larger than the sum of its proper divisors (29789850128).

31421232112 is a wasteful number, since it uses less digits than its factorization.

31421232112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6901 (or 6895 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

Adding to 31421232112 its reverse (21123212413), we get a palindrome (52544444525).

The spelling of 31421232112 in words is "thirty-one billion, four hundred twenty-one million, two hundred thirty-two thousand, one hundred twelve".