211121200011111 has 32 divisors (see below), whose sum is σ = 317597927958528. Its totient is φ = 123853183470720.

The previous prime is 211121200011037. The next prime is 211121200011187. The reversal of 211121200011111 is 111110002121112.

It is not a de Polignac number, because 211121200011111 - 2⁷ = 211121200010983 is a prime.

It is a super-2 number, since 2×211121200011111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121200011311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1303088016 + ... + 1303250021.

It is an arithmetic number, because the mean of its divisors is an integer number (9924935248704).

Almost surely, 2^{211121200011111} is an apocalyptic number.

211121200011111 is a deficient number, since it is larger than the sum of its proper divisors (106476727947417).

211121200011111 is a wasteful number, since it uses less digits than its factorization.

211121200011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606338151.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 211121200011111 its reverse (111110002121112), we get a palindrome (322231202132223).

It can be divided in two parts, 21112120001 and 1111, that added together give a palindrome (21112121112).

The spelling of 211121200011111 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred million, eleven thousand, one hundred eleven".