11200121111 has 4 divisors (see below), whose sum is σ = 11262691800. Its totient is φ = 11137550424.

The previous prime is 11200121089. The next prime is 11200121113. The reversal of 11200121111 is 11112100211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112100211 = 7607 ⋅1460773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11200121111 is a prime.

It is a super-4 number, since 4×11200121111⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11200121092 and 11200121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200121113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31285076 + ... + 31285433.

It is an arithmetic number, because the mean of its divisors is an integer number (2815672950).

Almost surely, 2^11200121111 is an apocalyptic number.

11200121111 is a deficient number, since it is larger than the sum of its proper divisors (62570689).

11200121111 is an equidigital number, since it uses as much as digits as its factorization.

11200121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62570688.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11200121111 its reverse (11112100211), we get a palindrome (22312221322).

The spelling of 11200121111 in words is "eleven billion, two hundred million, one hundred twenty-one thousand, one hundred eleven".