31421442212 has 12 divisors (see below), whose sum is σ = 55016801280. Its totient is φ = 15702356136.

The previous prime is 31421442211. The next prime is 31421442259. The reversal of 31421442212 is 21224412413.

It is not an unprimeable number, because it can be changed into a prime (31421442211) 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, 2082788 + ... + 2097819.

It is an arithmetic number, because the mean of its divisors is an integer number (4584733440).

Almost surely, 2^31421442212 is an apocalyptic number.

It is an amenable number.

31421442212 is a deficient number, since it is larger than the sum of its proper divisors (23595359068).

31421442212 is a wasteful number, since it uses less digits than its factorization.

31421442212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182490 (or 4182488 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 31421442212 its reverse (21224412413), we get a palindrome (52645854625).

The spelling of 31421442212 in words is "thirty-one billion, four hundred twenty-one million, four hundred forty-two thousand, two hundred twelve".