1111211100001 has 4 divisors (see below), whose sum is σ = 1159524626112. Its totient is φ = 1062897573892.

The previous prime is 1111211099983. The next prime is 1111211100113. The reversal of 1111211100001 is 1000011121111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111211100001 - 2³⁹ = 561455286113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111211106001) 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, 24156763021 + ... + 24156763066.

It is an arithmetic number, because the mean of its divisors is an integer number (289881156528).

Almost surely, 2^{1111211100001} is an apocalyptic number.

It is an amenable number.

1111211100001 is a deficient number, since it is larger than the sum of its proper divisors (48313526111).

1111211100001 is an equidigital number, since it uses as much as digits as its factorization.

1111211100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48313526110.

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

Adding to 1111211100001 its reverse (1000011121111), we get a palindrome (2111222221112).

It can be divided in two parts, 1111 and 211100001, that added together give a palindrome (211101112).

The spelling of 1111211100001 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred thousand, one".