2001221053 has 16 divisors (see below), whose sum is σ = 2260581120. Its totient is φ = 1757758464.

The previous prime is 2001221039. The next prime is 2001221063. The reversal of 2001221053 is 3501221002.

It is a cyclic number.

It is not a de Polignac number, because 2001221053 - 2⁹ = 2001220541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001221063) 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, 40368 + ... + 75046.

It is an arithmetic number, because the mean of its divisors is an integer number (141286320).

Almost surely, 2^2001221053 is an apocalyptic number.

2001221053 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2001221053 is a deficient number, since it is larger than the sum of its proper divisors (259360067).

2001221053 is a wasteful number, since it uses less digits than its factorization.

2001221053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34908.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2001221053 is about 44735.0092544978. The cubic root of 2001221053 is about 1260.1774027948.

Adding to 2001221053 its reverse (3501221002), we get a palindrome (5502442055).

The spelling of 2001221053 in words is "two billion, one million, two hundred twenty-one thousand, fifty-three".