31101221012 has 24 divisors (see below), whose sum is σ = 54759004776. Its totient is φ = 15455848448.

The previous prime is 31101220999. The next prime is 31101221059. The reversal of 31101221012 is 21012210113.

It can be written as a sum of positive squares in 4 ways, for example, as 10282771216 + 20818449796 = 101404^2 + 144286^2 .

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, 3312068 + ... + 3321444.

It is an arithmetic number, because the mean of its divisors is an integer number (2281625199).

Almost surely, 2^31101221012 is an apocalyptic number.

It is an amenable number.

31101221012 is a deficient number, since it is larger than the sum of its proper divisors (23657783764).

31101221012 is a wasteful number, since it uses less digits than its factorization.

31101221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14347 (or 14345 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 31101221012 its reverse (21012210113), we get a palindrome (52113431125).

The spelling of 31101221012 in words is "thirty-one billion, one hundred one million, two hundred twenty-one thousand, twelve".