31021330030 has 32 divisors (see below), whose sum is σ = 56485252800. Its totient is φ = 12264882432.

The previous prime is 31021330027. The next prime is 31021330037. The reversal of 31021330030 is 3003312013.

It is a junction number, because it is equal to n+sod(n) for n = 31021329986 and 31021330013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021330037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4360116 + ... + 4367224.

It is an arithmetic number, because the mean of its divisors is an integer number (1765164150).

Almost surely, 2^31021330030 is an apocalyptic number.

31021330030 is a deficient number, since it is larger than the sum of its proper divisors (25463922770).

31021330030 is a wasteful number, since it uses less digits than its factorization.

31021330030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12108.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31021330030 its reverse (3003312013), we get a palindrome (34024642043).

The spelling of 31021330030 in words is "thirty-one billion, twenty-one million, three hundred thirty thousand, thirty".