1111112021111 has 4 divisors (see below), whose sum is σ = 1111136251632. Its totient is φ = 1111087790592.

The previous prime is 1111112021081. The next prime is 1111112021119. The reversal of 1111112021111 is 1111202111111.

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 1111112021111 - 2³⁸ = 836234114167 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 (1111112021119) 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, 12046346 + ... + 12138231.

It is an arithmetic number, because the mean of its divisors is an integer number (277784062908).

Almost surely, 2^{1111112021111} is an apocalyptic number.

1111112021111 is a deficient number, since it is larger than the sum of its proper divisors (24230521).

1111112021111 is an equidigital number, since it uses as much as digits as its factorization.

1111112021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24230520.

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

Adding to 1111112021111 its reverse (1111202111111), we get a palindrome (2222314132222).

It can be divided in two parts, 11 and 11112021111, that multiplied together give a palindrome (122232232221).

The spelling of 1111112021111 in words is "one trillion, one hundred eleven billion, one hundred twelve million, twenty-one thousand, one hundred eleven".