2221121130 has 64 divisors (see below), whose sum is σ = 5380905600. Its totient is φ = 586745856.

The previous prime is 2221121129. The next prime is 2221121173. The reversal of 2221121130 is 311211222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

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, 2116846 + ... + 2117894.

It is an arithmetic number, because the mean of its divisors is an integer number (84076650).

Almost surely, 2^2221121130 is an apocalyptic number.

2221121130 is an abundant number, since it is smaller than the sum of its proper divisors (3159784470).

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

2221121130 is a wasteful number, since it uses less digits than its factorization.

2221121130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2221121130 is about 47128.7717853967. The cubic root of 2221121130 is about 1304.7403132663.

Adding to 2221121130 its reverse (311211222), we get a palindrome (2532332352).

The spelling of 2221121130 in words is "two billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred thirty".