2001221030 has 32 divisors (see below), whose sum is σ = 3763335168. Its totient is φ = 764764000.

The previous prime is 2001220987. The next prime is 2001221039. The reversal of 2001221030 is 301221002.

It is a happy number.

It is a super-2 number, since 2×2001221030² = 8009771221828521800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001221039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204755 + ... + 214305.

It is an arithmetic number, because the mean of its divisors is an integer number (117604224).

Almost surely, 2^2001221030 is an apocalyptic number.

2001221030 is a deficient number, since it is larger than the sum of its proper divisors (1762114138).

2001221030 is a wasteful number, since it uses less digits than its factorization.

2001221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10492.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2001221030 is about 44735.0089974284. The cubic root of 2001221030 is about 1260.1773979671.

Adding to 2001221030 its reverse (301221002), we get a palindrome (2302442032).

The spelling of 2001221030 in words is "two billion, one million, two hundred twenty-one thousand, thirty".