2221111992 has 128 divisors (see below), whose sum is σ = 6219244800. Its totient is φ = 655334400.

The previous prime is 2221111973. The next prime is 2221111993. The reversal of 2221111992 is 2991111222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221111993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1722484 + ... + 1723772.

It is an arithmetic number, because the mean of its divisors is an integer number (48587850).

Almost surely, 2^2221111992 is an apocalyptic number.

2221111992 is a gapful number since it is divisible by the number (22) 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 2221111992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3109622400).

2221111992 is an abundant number, since it is smaller than the sum of its proper divisors (3998132808).

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

2221111992 is a wasteful number, since it uses less digits than its factorization.

2221111992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477 (or 1473 counting only the distinct ones).

The product of its digits is 1296, while the sum is 30.

The square root of 2221111992 is about 47128.6748381492. The cubic root of 2221111992 is about 1304.7385239697.

The spelling of 2221111992 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred ninety-two".