31212220330 has 8 divisors (see below), whose sum is σ = 56181996612. Its totient is φ = 12484888128.

The previous prime is 31212220321. The next prime is 31212220331. The reversal of 31212220330 is 3302221213.

It can be written as a sum of positive squares in 2 ways, for example, as 30754987641 + 457232689 = 175371^2 + 21383^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31212220298 and 31212220307.

It is not an unprimeable number, because it can be changed into a prime (31212220331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560611007 + ... + 1560611026.

Almost surely, 2^31212220330 is an apocalyptic number.

31212220330 is a deficient number, since it is larger than the sum of its proper divisors (24969776282).

31212220330 is a wasteful number, since it uses less digits than its factorization.

31212220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121222040.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31212220330 its reverse (3302221213), we get a palindrome (34514441543).

The spelling of 31212220330 in words is "thirty-one billion, two hundred twelve million, two hundred twenty thousand, three hundred thirty".