2221021131 has 32 divisors (see below), whose sum is σ = 3611389440. Its totient is φ = 1185871104.

The previous prime is 2221021129. The next prime is 2221021141. The reversal of 2221021131 is 1311201222.

It is not a de Polignac number, because 2221021131 - 2¹ = 2221021129 is a prime.

It is a super-2 number, since 2×2221021131² = 9865869728697038322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2221021131.

It is not an unprimeable number, because it can be changed into a prime (2221021141) 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, 9000 + ... + 67253.

It is an arithmetic number, because the mean of its divisors is an integer number (112855920).

Almost surely, 2^2221021131 is an apocalyptic number.

2221021131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221021131 is a deficient number, since it is larger than the sum of its proper divisors (1390368309).

2221021131 is a wasteful number, since it uses less digits than its factorization.

2221021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76355.

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

The square root of 2221021131 is about 47127.7108610210. The cubic root of 2221021131 is about 1304.7207323614.

Adding to 2221021131 its reverse (1311201222), we get a palindrome (3532222353).

The spelling of 2221021131 in words is "two billion, two hundred twenty-one million, twenty-one thousand, one hundred thirty-one".