31421333212 has 6 divisors (see below), whose sum is σ = 54987333128. Its totient is φ = 15710666604.

The previous prime is 31421333173. The next prime is 31421333233. The reversal of 31421333212 is 21233312413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927666648 + ... + 3927666655.

Almost surely, 2^31421333212 is an apocalyptic number.

It is an amenable number.

31421333212 is a deficient number, since it is larger than the sum of its proper divisors (23565999916).

31421333212 is a wasteful number, since it uses less digits than its factorization.

31421333212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855333307 (or 7855333305 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 31421333212 its reverse (21233312413), we get a palindrome (52654645625).

The spelling of 31421333212 in words is "thirty-one billion, four hundred twenty-one million, three hundred thirty-three thousand, two hundred twelve".