1111210121111 has 4 divisors (see below), whose sum is σ = 1119959807232. Its totient is φ = 1102460434992.

The previous prime is 1111210121093. The next prime is 1111210121113.

1111210121111 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1111210121111 - 2²⁶ = 1111143012247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111210121113) 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, 4374842870 + ... + 4374843123.

It is an arithmetic number, because the mean of its divisors is an integer number (279989951808).

Almost surely, 2^{1111210121111} is an apocalyptic number.

1111210121111 is a deficient number, since it is larger than the sum of its proper divisors (8749686121).

1111210121111 is an equidigital number, since it uses as much as digits as its factorization.

1111210121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749686120.

The product of its (nonzero) digits is 4, while the sum is 14.

It can be divided in two parts, 1111210 and 121111, that added together give a palindrome (1232321).

The spelling of 1111210121111 in words is "one trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, one hundred eleven".