2221133981 has 8 divisors (see below), whose sum is σ = 2426989824. Its totient is φ = 2015933920.

The previous prime is 2221133977. The next prime is 2221133987. The reversal of 2221133981 is 1893311222.

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

It is not a de Polignac number, because 2221133981 - 2² = 2221133977 is a prime.

It is a super-2 number, since 2×2221133981² = 9866872323105816722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221133987) 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, 156845 + ... + 170418.

It is an arithmetic number, because the mean of its divisors is an integer number (303373728).

Almost surely, 2^2221133981 is an apocalyptic number.

It is an amenable number.

2221133981 is a deficient number, since it is larger than the sum of its proper divisors (205855843).

2221133981 is a wasteful number, since it uses less digits than its factorization.

2221133981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327891.

The product of its digits is 5184, while the sum is 32.

The square root of 2221133981 is about 47128.9081244198. The cubic root of 2221133981 is about 1304.7428295909.

The spelling of 2221133981 in words is "two billion, two hundred twenty-one million, one hundred thirty-three thousand, nine hundred eighty-one".