1211110000111 has 4 divisors (see below), whose sum is σ = 1321210909224. Its totient is φ = 1101009091000.

The previous prime is 1211110000099. The next prime is 1211110000141. The reversal of 1211110000111 is 1110000111121.

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 1211110000111 - 2²¹ = 1211107902959 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 (1211110000141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55050454540 + ... + 55050454561.

It is an arithmetic number, because the mean of its divisors is an integer number (330302727306).

Almost surely, 2^{1211110000111} is an apocalyptic number.

1211110000111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211110000111 is a deficient number, since it is larger than the sum of its proper divisors (110100909113).

1211110000111 is a wasteful number, since it uses less digits than its factorization.

1211110000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110100909112.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1211110000111 its reverse (1110000111121), we get a palindrome (2321110111232).

It can be divided in two parts, 121 and 1110000111, that multiplied together give a palindrome (134310013431).

The spelling of 1211110000111 in words is "one trillion, two hundred eleven billion, one hundred ten million, one hundred eleven", and thus it is an aban number.