31221211102 has 16 divisors (see below), whose sum is σ = 48821169024. Its totient is φ = 14957460000.

The previous prime is 31221211097. The next prime is 31221211139. The reversal of 31221211102 is 20111212213.

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, 2486649 + ... + 2499172.

It is an arithmetic number, because the mean of its divisors is an integer number (3051323064).

Almost surely, 2^31221211102 is an apocalyptic number.

31221211102 is a deficient number, since it is larger than the sum of its proper divisors (17599957922).

31221211102 is a wasteful number, since it uses less digits than its factorization.

31221211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985955.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31221211102 its reverse (20111212213), we get a palindrome (51332423315).

The spelling of 31221211102 in words is "thirty-one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred two".