1111112121101 has 4 divisors (see below), whose sum is σ = 1111213390812. Its totient is φ = 1111010851392.

The previous prime is 1111112121089. The next prime is 1111112121103. The reversal of 1111112121101 is 1011212111111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 581404725001 + 529707396100 = 762499^2 + 727810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111112121101 - 2¹⁰ = 1111112120077 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 (1111112121103) 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, 50618396 + ... + 50640341.

It is an arithmetic number, because the mean of its divisors is an integer number (277803347703).

Almost surely, 2^{1111112121101} is an apocalyptic number.

It is an amenable number.

1111112121101 is a deficient number, since it is larger than the sum of its proper divisors (101269711).

1111112121101 is a wasteful number, since it uses less digits than its factorization.

1111112121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101269710.

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

Adding to 1111112121101 its reverse (1011212111111), we get a palindrome (2122324232212).

The spelling of 1111112121101 in words is "one trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, one hundred one".