31221302104 has 32 divisors (see below), whose sum is σ = 58776321600. Its totient is φ = 15547705600.

The previous prime is 31221302089. The next prime is 31221302107. The reversal of 31221302104 is 40120312213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221302107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3264129 + ... + 3273679.

It is an arithmetic number, because the mean of its divisors is an integer number (1836760050).

Almost surely, 2^31221302104 is an apocalyptic number.

It is an amenable number.

31221302104 is a deficient number, since it is larger than the sum of its proper divisors (27555019496).

31221302104 is a wasteful number, since it uses less digits than its factorization.

31221302104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11163 (or 11159 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31221302104 its reverse (40120312213), we get a palindrome (71341614317).

The spelling of 31221302104 in words is "thirty-one billion, two hundred twenty-one million, three hundred two thousand, one hundred four".