2001210321 has 64 divisors (see below), whose sum is σ = 3185049600. Its totient is φ = 1104552000.

The previous prime is 2001210293. The next prime is 2001210361. The reversal of 2001210321 is 1230121002.

It is not a de Polignac number, because 2001210321 - 2²¹ = 1999113169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001210297 and 2001210306.

It is not an unprimeable number, because it can be changed into a prime (2001210361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1738096 + ... + 1739246.

It is an arithmetic number, because the mean of its divisors is an integer number (49766400).

Almost surely, 2^2001210321 is an apocalyptic number.

It is an amenable number.

2001210321 is a deficient number, since it is larger than the sum of its proper divisors (1183839279).

2001210321 is a wasteful number, since it uses less digits than its factorization.

2001210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290.

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

The square root of 2001210321 is about 44734.8893035403. The cubic root of 2001210321 is about 1260.1751501288.

Adding to 2001210321 its reverse (1230121002), we get a palindrome (3231331323).

The spelling of 2001210321 in words is "two billion, one million, two hundred ten thousand, three hundred twenty-one".