20201001321 has 16 divisors (see below), whose sum is σ = 27056542464. Its totient is φ = 13406500224.

The previous prime is 20201001319. The next prime is 20201001329. The reversal of 20201001321 is 12310010202.

It is not a de Polignac number, because 20201001321 - 2¹ = 20201001319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201001297 and 20201001306.

It is not an unprimeable number, because it can be changed into a prime (20201001329) 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, 811360 + ... + 835886.

It is an arithmetic number, because the mean of its divisors is an integer number (1691033904).

Almost surely, 2^20201001321 is an apocalyptic number.

It is an amenable number.

20201001321 is a deficient number, since it is larger than the sum of its proper divisors (6855541143).

20201001321 is a wasteful number, since it uses less digits than its factorization.

20201001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25760.

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

Adding to 20201001321 its reverse (12310010202), we get a palindrome (32511011523).

The spelling of 20201001321 in words is "twenty billion, two hundred one million, one thousand, three hundred twenty-one".