11231221013111 has 8 divisors (see below), whose sum is σ = 12261972844800. Its totient is φ = 10202091138040.

The previous prime is 11231221013101. The next prime is 11231221013123. The reversal of 11231221013111 is 11131012213211.

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-11231221013111 is a prime.

It is a super-2 number, since 2×11231221013111² (a number of 27 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 (11231221013101) 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, 405474671 + ... + 405502368.

It is an arithmetic number, because the mean of its divisors is an integer number (1532746605600).

Almost surely, 2^{11231221013111} is an apocalyptic number.

11231221013111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11231221013111 is a deficient number, since it is larger than the sum of its proper divisors (1030751831689).

11231221013111 is a wasteful number, since it uses less digits than its factorization.

11231221013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810978309.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 11231221013111 its reverse (11131012213211), we get a palindrome (22362233226322).

The spelling of 11231221013111 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-one million, thirteen thousand, one hundred eleven".