31420222120 has 128 divisors (see below), whose sum is σ = 87537542400. Its totient is φ = 9903108096.

The previous prime is 31420222079. The next prime is 31420222133. The reversal of 31420222120 is 2122202413.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127926 + ... + 281434.

It is an arithmetic number, because the mean of its divisors is an integer number (683887050).

Almost surely, 2^31420222120 is an apocalyptic number.

31420222120 is the 102340-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31420222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43768771200).

31420222120 is an abundant number, since it is smaller than the sum of its proper divisors (56117320280).

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

31420222120 is a wasteful number, since it uses less digits than its factorization.

31420222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153587 (or 153583 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31420222120 its reverse (2122202413), we get a palindrome (33542424533).

The spelling of 31420222120 in words is "thirty-one billion, four hundred twenty million, two hundred twenty-two thousand, one hundred twenty".