20211202201211 has 4 divisors (see below), whose sum is σ = 23098516801392. Its totient is φ = 17323887601032.

The previous prime is 20211202201171. The next prime is 20211202201283. The reversal of 20211202201211 is 11210220211202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211202201211 is a prime.

It is a super-3 number, since 3×20211202201211³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211202201211.

It is not an unprimeable number, because it can be changed into a prime (20211202201511) 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, 1443657300080 + ... + 1443657300093.

It is an arithmetic number, because the mean of its divisors is an integer number (5774629200348).

Almost surely, 2^{20211202201211} is an apocalyptic number.

20211202201211 is a deficient number, since it is larger than the sum of its proper divisors (2887314600181).

20211202201211 is an equidigital number, since it uses as much as digits as its factorization.

20211202201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887314600180.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211202201211 its reverse (11210220211202), we get a palindrome (31421422412413).

The spelling of 20211202201211 in words is "twenty trillion, two hundred eleven billion, two hundred two million, two hundred one thousand, two hundred eleven".