20221323011 has 4 divisors (see below), whose sum is σ = 21100510992. Its totient is φ = 19342135032.

The previous prime is 20221323007. The next prime is 20221323049. The reversal of 20221323011 is 11032312202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20221323011 - 2² = 20221323007 is a prime.

It is a super-2 number, since 2×20221323011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221323611) 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, 439593956 + ... + 439594001.

It is an arithmetic number, because the mean of its divisors is an integer number (5275127748).

Almost surely, 2^20221323011 is an apocalyptic number.

20221323011 is a deficient number, since it is larger than the sum of its proper divisors (879187981).

20221323011 is an equidigital number, since it uses as much as digits as its factorization.

20221323011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879187980.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20221323011 its reverse (11032312202), we get a palindrome (31253635213).

The spelling of 20221323011 in words is "twenty billion, two hundred twenty-one million, three hundred twenty-three thousand, eleven".