11101211111001 has 32 divisors (see below), whose sum is σ = 16155282401280. Its totient is φ = 6724646740800.

The previous prime is 11101211110999. The next prime is 11101211111017. The reversal of 11101211111001 is 10011111210111.

It is not a de Polignac number, because 11101211111001 - 2¹ = 11101211110999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11101211111021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1002904495 + ... + 1002915563.

It is an arithmetic number, because the mean of its divisors is an integer number (504852575040).

Almost surely, 2^{11101211111001} is an apocalyptic number.

11101211111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101211111001 is a deficient number, since it is larger than the sum of its proper divisors (5054071290279).

11101211111001 is a wasteful number, since it uses less digits than its factorization.

11101211111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23517.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 11101211111001 its reverse (10011111210111), we get a palindrome (21112322321112).

The spelling of 11101211111001 in words is "eleven trillion, one hundred one billion, two hundred eleven million, one hundred eleven thousand, one".