31221221001130 has 32 divisors (see below), whose sum is σ = 56217489350400. Its totient is φ = 12484202016000.

The previous prime is 31221221001097. The next prime is 31221221001149. The reversal of 31221221001130 is 3110012212213.

It is a super-2 number, since 2×31221221001130² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31221221001098 and 31221221001107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505567755 + ... + 505629505.

It is an arithmetic number, because the mean of its divisors is an integer number (1756796542200).

Almost surely, 2^{31221221001130} is an apocalyptic number.

31221221001130 is a deficient number, since it is larger than the sum of its proper divisors (24996268349270).

31221221001130 is a wasteful number, since it uses less digits than its factorization.

31221221001130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78294.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31221221001130 its reverse (3110012212213), we get a palindrome (34331233213343).

The spelling of 31221221001130 in words is "thirty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, one thousand, one hundred thirty".