1111211110001 has 8 divisors (see below), whose sum is σ = 1116913178304. Its totient is φ = 1105509662320.

The previous prime is 1111211109979. The next prime is 1111211110013. The reversal of 1111211110001 is 1000111121111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111211110001 - 2²⁶ = 1111144001137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111211110091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3677036 + ... + 3967746.

It is an arithmetic number, because the mean of its divisors is an integer number (139614147288).

Almost surely, 2^{1111211110001} is an apocalyptic number.

It is an amenable number.

1111211110001 is a deficient number, since it is larger than the sum of its proper divisors (5702068303).

1111211110001 is a wasteful number, since it uses less digits than its factorization.

1111211110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310311.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1111211110001 its reverse (1000111121111), we get a palindrome (2111322231112).

It can be divided in two parts, 1111 and 211110001, that added together give a palindrome (211111112).

The spelling of 1111211110001 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred ten thousand, one".