11112222001 has 16 divisors (see below), whose sum is σ = 12011011200. Its totient is φ = 10249037568.

The previous prime is 11112221993. The next prime is 11112222031. The reversal of 11112222001 is 10022221111.

It is a cyclic number.

It is not a de Polignac number, because 11112222001 - 2³ = 11112221993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11112222031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514345 + ... + 535513.

It is an arithmetic number, because the mean of its divisors is an integer number (750688200).

Almost surely, 2^11112222001 is an apocalyptic number.

It is an amenable number.

11112222001 is a deficient number, since it is larger than the sum of its proper divisors (898789199).

11112222001 is a wasteful number, since it uses less digits than its factorization.

11112222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22008.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11112222001 its reverse (10022221111), we get a palindrome (21134443112).

The spelling of 11112222001 in words is "eleven billion, one hundred twelve million, two hundred twenty-two thousand, one".