11230123211 has 16 divisors (see below), whose sum is σ = 11976592608. Its totient is φ = 10493376000.

The previous prime is 11230123181. The next prime is 11230123291. The reversal of 11230123211 is 11232103211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11230123211 is a prime.

It is a super-2 number, since 2×11230123211² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11230123211.

It is not an unprimeable number, because it can be changed into a prime (11230123291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412236 + ... + 2416886.

It is an arithmetic number, because the mean of its divisors is an integer number (748537038).

Almost surely, 2^11230123211 is an apocalyptic number.

11230123211 is a deficient number, since it is larger than the sum of its proper divisors (746469397).

11230123211 is a wasteful number, since it uses less digits than its factorization.

11230123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5662.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11230123211 its reverse (11232103211), we get a palindrome (22462226422).

The spelling of 11230123211 in words is "eleven billion, two hundred thirty million, one hundred twenty-three thousand, two hundred eleven".