20321201001 has 32 divisors (see below), whose sum is σ = 28493136000. Its totient is φ = 12865241088.

The previous prime is 20321200987. The next prime is 20321201027. The reversal of 20321201001 is 10010212302.

It is not a de Polignac number, because 20321201001 - 2¹⁵ = 20321168233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321201101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1647465 + ... + 1659753.

It is an arithmetic number, because the mean of its divisors is an integer number (890410500).

Almost surely, 2^20321201001 is an apocalyptic number.

It is an amenable number.

20321201001 is a deficient number, since it is larger than the sum of its proper divisors (8171934999).

20321201001 is a wasteful number, since it uses less digits than its factorization.

20321201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12633.

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

Adding to 20321201001 its reverse (10010212302), we get a palindrome (30331413303).

The spelling of 20321201001 in words is "twenty billion, three hundred twenty-one million, two hundred one thousand, one".