2221131121 has 8 divisors (see below), whose sum is σ = 2501215488. Its totient is φ = 1954074000.

The previous prime is 2221131119. The next prime is 2221131131. The reversal of 2221131121 is 1211311222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221131121 - 2¹ = 2221131119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221131095 and 2221131104.

It is not an unprimeable number, because it can be changed into a prime (2221131131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256450 + ... + 3257131.

It is an arithmetic number, because the mean of its divisors is an integer number (312651936).

Almost surely, 2^2221131121 is an apocalyptic number.

It is an amenable number.

2221131121 is a deficient number, since it is larger than the sum of its proper divisors (280084367).

2221131121 is a wasteful number, since it uses less digits than its factorization.

2221131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513623.

The product of its digits is 48, while the sum is 16.

The square root of 2221131121 is about 47128.8777820987. The cubic root of 2221131121 is about 1304.7422695817.

Adding to 2221131121 its reverse (1211311222), we get a palindrome (3432442343).

The spelling of 2221131121 in words is "two billion, two hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-one".