31012204421 has 16 divisors (see below), whose sum is σ = 35103856128. Its totient is φ = 27142041600.

The previous prime is 31012204403. The next prime is 31012204499. The reversal of 31012204421 is 12440221013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31012204421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31012204393 and 31012204402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012204621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169796 + ... + 301421.

It is an arithmetic number, because the mean of its divisors is an integer number (2193991008).

Almost surely, 2^31012204421 is an apocalyptic number.

31012204421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31012204421 is a deficient number, since it is larger than the sum of its proper divisors (4091651707).

31012204421 is a wasteful number, since it uses less digits than its factorization.

31012204421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471452.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31012204421 its reverse (12440221013), we get a palindrome (43452425434).

The spelling of 31012204421 in words is "thirty-one billion, twelve million, two hundred four thousand, four hundred twenty-one".