31221410404 has 6 divisors (see below), whose sum is σ = 54637468214. Its totient is φ = 15610705200.

The previous prime is 31221410327. The next prime is 31221410447. The reversal of 31221410404 is 40401412213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24448449600 + 6772960804 = 156360^2 + 82298^2 .

It is a super-2 number, since 2×31221410404² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3902676297 + ... + 3902676304.

Almost surely, 2^31221410404 is an apocalyptic number.

It is an amenable number.

31221410404 is a deficient number, since it is larger than the sum of its proper divisors (23416057810).

31221410404 is a wasteful number, since it uses less digits than its factorization.

31221410404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7805352605 (or 7805352603 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31221410404 its reverse (40401412213), we get a palindrome (71622822617).

The spelling of 31221410404 in words is "thirty-one billion, two hundred twenty-one million, four hundred ten thousand, four hundred four".