20311133211111 has 8 divisors (see below), whose sum is σ = 27094792717440. Its totient is φ = 13534114589432.

The previous prime is 20311133211101. The next prime is 20311133211181. The reversal of 20311133211111 is 11111233111302.

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

It is a cyclic number.

It is not a de Polignac number, because 20311133211111 - 2⁵ = 20311133211079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311133211101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660214025 + ... + 1660226258.

It is an arithmetic number, because the mean of its divisors is an integer number (3386849089680).

Almost surely, 2^{20311133211111} is an apocalyptic number.

20311133211111 is a deficient number, since it is larger than the sum of its proper divisors (6783659506329).

20311133211111 is a wasteful number, since it uses less digits than its factorization.

20311133211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320442325.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 20311133211111 its reverse (11111233111302), we get a palindrome (31422366322413).

The spelling of 20311133211111 in words is "twenty trillion, three hundred eleven billion, one hundred thirty-three million, two hundred eleven thousand, one hundred eleven".