2001221130 has 32 divisors (see below), whose sum is σ = 5085457344. Its totient is φ = 502267136.

The previous prime is 2001221119. The next prime is 2001221141. The reversal of 2001221130 is 311221002.

It is an interprime number because it is at equal distance from previous prime (2001221119) and next prime (2001221141).

It is a super-2 number, since 2×2001221130² = 8009772022316953800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1961472 + ... + 1962491.

It is an arithmetic number, because the mean of its divisors is an integer number (158920542).

Almost surely, 2^2001221130 is an apocalyptic number.

2001221130 is an abundant number, since it is smaller than the sum of its proper divisors (3084236214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001221130 is a wasteful number, since it uses less digits than its factorization.

2001221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923990.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2001221130 is about 44735.0101151212. The cubic root of 2001221130 is about 1260.1774189572.

Adding to 2001221130 its reverse (311221002), we get a palindrome (2312442132).

The spelling of 2001221130 in words is "two billion, one million, two hundred twenty-one thousand, one hundred thirty".