20011323223211 has 4 divisors (see below), whose sum is σ = 20388895359552. Its totient is φ = 19633751086872.

The previous prime is 20011323223127. The next prime is 20011323223219. The reversal of 20011323223211 is 11232232311002.

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 20011323223211 - 2¹⁴ = 20011323206827 is a prime.

It is a super-2 number, since 2×20011323223211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011323223219) 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, 188786068091 + ... + 188786068196.

It is an arithmetic number, because the mean of its divisors is an integer number (5097223839888).

Almost surely, 2^{20011323223211} is an apocalyptic number.

20011323223211 is a deficient number, since it is larger than the sum of its proper divisors (377572136341).

20011323223211 is an equidigital number, since it uses as much as digits as its factorization.

20011323223211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377572136340.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20011323223211 its reverse (11232232311002), we get a palindrome (31243555534213).

The spelling of 20011323223211 in words is "twenty trillion, eleven billion, three hundred twenty-three million, two hundred twenty-three thousand, two hundred eleven".