20311133212211 has 8 divisors (see below), whose sum is σ = 22309711537920. Its totient is φ = 18405512017992.

The previous prime is 20311133212193. The next prime is 20311133212243. The reversal of 20311133212211 is 11221233111302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311133212211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311133215211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23239282415 + ... + 23239283288.

It is an arithmetic number, because the mean of its divisors is an integer number (2788713942240).

Almost surely, 2^{20311133212211} is an apocalyptic number.

20311133212211 is a deficient number, since it is larger than the sum of its proper divisors (1998578325709).

20311133212211 is a wasteful number, since it uses less digits than its factorization.

20311133212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46478565745.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20311133212211 its reverse (11221233111302), we get a palindrome (31532366323513).

The spelling of 20311133212211 in words is "twenty trillion, three hundred eleven billion, one hundred thirty-three million, two hundred twelve thousand, two hundred eleven".