20211321011 has 24 divisors (see below), whose sum is σ = 23656917024. Its totient is φ = 17216868480.

The previous prime is 20211320999. The next prime is 20211321019. The reversal of 20211321011 is 11012311202.

It is not a de Polignac number, because 20211321011 - 2⁶ = 20211320947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211321019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7453946 + ... + 7456656.

It is an arithmetic number, because the mean of its divisors is an integer number (985704876).

Almost surely, 2^20211321011 is an apocalyptic number.

20211321011 is a deficient number, since it is larger than the sum of its proper divisors (3445596013).

20211321011 is a wasteful number, since it uses less digits than its factorization.

20211321011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611 (or 3604 counting only the distinct ones).

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

Adding to 20211321011 its reverse (11012311202), we get a palindrome (31223632213).

The spelling of 20211321011 in words is "twenty billion, two hundred eleven million, three hundred twenty-one thousand, eleven".