31122230000 has 100 divisors (see below), whose sum is σ = 75462781680. Its totient is φ = 12430272000.

The previous prime is 31122229981. The next prime is 31122230119. The reversal of 31122230000 is 3222113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 8088077 + ... + 8091923.

Almost surely, 2^31122230000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31122230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37731390840).

31122230000 is an abundant number, since it is smaller than the sum of its proper divisors (44340551680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31122230000 is an equidigital number, since it uses as much as digits as its factorization.

31122230000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31122230000 its reverse (3222113), we get a palindrome (31125452113).

The spelling of 31122230000 in words is "thirty-one billion, one hundred twenty-two million, two hundred thirty thousand".