20211011321 has 4 divisors (see below), whose sum is σ = 20240260944. Its totient is φ = 20181761700.

The previous prime is 20211011297. The next prime is 20211011347. The reversal of 20211011321 is 12311011202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20211011321 - 2⁶ = 20211011257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211011296 and 20211011305.

It is not an unprimeable number, because it can be changed into a prime (20211011351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14623775 + ... + 14625156.

It is an arithmetic number, because the mean of its divisors is an integer number (5060065236).

Almost surely, 2^20211011321 is an apocalyptic number.

It is an amenable number.

20211011321 is a deficient number, since it is larger than the sum of its proper divisors (29249623).

20211011321 is an equidigital number, since it uses as much as digits as its factorization.

20211011321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29249622.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20211011321 its reverse (12311011202), we get a palindrome (32522022523).

The spelling of 20211011321 in words is "twenty billion, two hundred eleven million, eleven thousand, three hundred twenty-one".