23211211311 has 8 divisors (see below), whose sum is σ = 34386979760. Its totient is φ = 15474140856.

The previous prime is 23211211291. The next prime is 23211211393. The reversal of 23211211311 is 11311211232.

23211211311 is a `hidden beast` number, since 232 + 1 + 121 + 1 + 311 = 666.

It is not a de Polignac number, because 23211211311 - 2⁷ = 23211211183 is a prime.

It is a super-3 number, since 3×23211211311³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211216311) 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, 429837220 + ... + 429837273.

It is an arithmetic number, because the mean of its divisors is an integer number (4298372470).

Almost surely, 2^23211211311 is an apocalyptic number.

23211211311 is a deficient number, since it is larger than the sum of its proper divisors (11175768449).

23211211311 is an equidigital number, since it uses as much as digits as its factorization.

23211211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859674502 (or 859674496 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 23211211311 its reverse (11311211232), we get a palindrome (34522422543).

The spelling of 23211211311 in words is "twenty-three billion, two hundred eleven million, two hundred eleven thousand, three hundred eleven".