1111211101001 has 8 divisors (see below), whose sum is σ = 1134921419904. Its totient is φ = 1087503595920.

The previous prime is 1111211100931. The next prime is 1111211101027. The reversal of 1111211101001 is 1001011121111.

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 a de Polignac number, because none of the positive numbers 2^k-1111211101001 is a prime.

It is a super-2 number, since 2×1111211101001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111211101051) 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, 104591 + ... + 1494443.

It is an arithmetic number, because the mean of its divisors is an integer number (141865177488).

Almost surely, 2^{1111211101001} is an apocalyptic number.

It is an amenable number.

1111211101001 is a deficient number, since it is larger than the sum of its proper divisors (23710318903).

1111211101001 is a wasteful number, since it uses less digits than its factorization.

1111211101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406911.

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

Adding to 1111211101001 its reverse (1001011121111), we get a palindrome (2112222222112).

The spelling of 1111211101001 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred one thousand, one".