31021000302212 has 12 divisors (see below), whose sum is σ = 54289392492300. Its totient is φ = 15509745304416.

The previous prime is 31021000302211. The next prime is 31021000302217. The reversal of 31021000302212 is 21220300012013.

It can be written as a sum of positive squares in 2 ways, for example, as 24424609399876 + 6596390902336 = 4942126^2 + 2568344^2 .

It is not an unprimeable number, because it can be changed into a prime (31021000302211) 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, 188619203 + ... + 188783594.

It is an arithmetic number, because the mean of its divisors is an integer number (4524116041025).

Almost surely, 2^{31021000302212} is an apocalyptic number.

It is an amenable number.

31021000302212 is a deficient number, since it is larger than the sum of its proper divisors (23268392190088).

31021000302212 is a wasteful number, since it uses less digits than its factorization.

31021000302212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377423350 (or 377423348 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31021000302212 its reverse (21220300012013), we get a palindrome (52241300314225).

The spelling of 31021000302212 in words is "thirty-one trillion, twenty-one billion, three hundred two thousand, two hundred twelve".