11212112011 has 8 divisors (see below), whose sum is σ = 11267942400. Its totient is φ = 11156420520.

The previous prime is 11212111973. The next prime is 11212112063. The reversal of 11212112011 is 11021121211.

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 11212112011 - 2⁹ = 11212111499 is a prime.

It is a super-2 number, since 2×11212112011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212111982 and 11212112000.

It is not an unprimeable number, because it can be changed into a prime (11212112081) 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, 129030 + ... + 197668.

It is an arithmetic number, because the mean of its divisors is an integer number (1408492800).

Almost surely, 2^11212112011 is an apocalyptic number.

11212112011 is a deficient number, since it is larger than the sum of its proper divisors (55830389).

11212112011 is an equidigital number, since it uses as much as digits as its factorization.

11212112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69449.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11212112011 its reverse (11021121211), we get a palindrome (22233233222).

The spelling of 11212112011 in words is "eleven billion, two hundred twelve million, one hundred twelve thousand, eleven".