2001221092 has 24 divisors (see below), whose sum is σ = 3781680056. Its totient is φ = 921155328.

The previous prime is 2001221077. The next prime is 2001221119. The reversal of 2001221092 is 2901221002.

It can be written as a sum of positive squares in 4 ways, for example, as 60466176 + 1940754916 = 7776^2 + 44054^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32193 + ... + 70984.

Almost surely, 2^2001221092 is an apocalyptic number.

It is an amenable number.

2001221092 is a deficient number, since it is larger than the sum of its proper divisors (1780458964).

2001221092 is a wasteful number, since it uses less digits than its factorization.

2001221092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103567 (or 103565 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2001221092 is about 44735.0096903980. The cubic root of 2001221092 is about 1260.1774109810.

Adding to 2001221092 its reverse (2901221002), we get a palindrome (4902442094).

The spelling of 2001221092 in words is "two billion, one million, two hundred twenty-one thousand, ninety-two".