11221111001 has 8 divisors (see below), whose sum is σ = 11905989120. Its totient is φ = 10538989888.

The previous prime is 11221110997. The next prime is 11221111003. The reversal of 11221111001 is 10011112211.

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 11221111001 - 2² = 11221110997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221111003) 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, 680861 + ... + 697146.

It is an arithmetic number, because the mean of its divisors is an integer number (1488248640).

Almost surely, 2^11221111001 is an apocalyptic number.

It is an amenable number.

11221111001 is a deficient number, since it is larger than the sum of its proper divisors (684878119).

11221111001 is a wasteful number, since it uses less digits than its factorization.

11221111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378503.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11221111001 its reverse (10011112211), we get a palindrome (21232223212).

The spelling of 11221111001 in words is "eleven billion, two hundred twenty-one million, one hundred eleven thousand, one".