11231021311 has 8 divisors (see below), whose sum is σ = 11389159440. Its totient is φ = 11072999232.

The previous prime is 11231021303. The next prime is 11231021327. The reversal of 11231021311 is 11312013211.

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 not a de Polignac number, because 11231021311 - 2³ = 11231021303 is a prime.

It is a super-2 number, since 2×11231021311² (a number of 21 digits) contains 22 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 (11231021381) 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, 176016 + ... + 231178.

It is an arithmetic number, because the mean of its divisors is an integer number (1423644930).

Almost surely, 2^11231021311 is an apocalyptic number.

11231021311 is a deficient number, since it is larger than the sum of its proper divisors (158138129).

11231021311 is an equidigital number, since it uses as much as digits as its factorization.

11231021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58025.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11231021311 its reverse (11312013211), we get a palindrome (22543034522).

The spelling of 11231021311 in words is "eleven billion, two hundred thirty-one million, twenty-one thousand, three hundred eleven".