2031221120 has 64 divisors (see below), whose sum is σ = 4861434240. Its totient is φ = 811560960.

The previous prime is 2031221117. The next prime is 2031221141. The reversal of 2031221120 is 211221302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 2031221095 and 2031221104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946769 + ... + 948911.

It is an arithmetic number, because the mean of its divisors is an integer number (75959910).

Almost surely, 2^2031221120 is an apocalyptic number.

2031221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430717120).

2031221120 is an abundant number, since it is smaller than the sum of its proper divisors (2830213120).

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

2031221120 is a wasteful number, since it uses less digits than its factorization.

2031221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643 (or 3631 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2031221120 is about 45069.0705473277. The cubic root of 2031221120 is about 1266.4432526866.

Adding to 2031221120 its reverse (211221302), we get a palindrome (2242442422).

The spelling of 2031221120 in words is "two billion, thirty-one million, two hundred twenty-one thousand, one hundred twenty".