31220001212 has 6 divisors (see below), whose sum is σ = 54635002128. Its totient is φ = 15610000604.

The previous prime is 31220001199. The next prime is 31220001247. The reversal of 31220001212 is 21210002213.

It is a happy number.

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, 3902500148 + ... + 3902500155.

It is an arithmetic number, because the mean of its divisors is an integer number (9105833688).

Almost surely, 2^31220001212 is an apocalyptic number.

It is an amenable number.

31220001212 is a deficient number, since it is larger than the sum of its proper divisors (23415000916).

31220001212 is a wasteful number, since it uses less digits than its factorization.

31220001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805000307 (or 7805000305 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31220001212 its reverse (21210002213), we get a palindrome (52430003425).

The spelling of 31220001212 in words is "thirty-one billion, two hundred twenty million, one thousand, two hundred twelve".