11222121001 has 16 divisors (see below), whose sum is σ = 13839033600. Its totient is φ = 8861560128.

The previous prime is 11222120989. The next prime is 11222121023. The reversal of 11222121001 is 10012122211.

It is a cyclic number.

It is not a de Polignac number, because 11222121001 - 2⁷ = 11222120873 is a prime.

It is a super-2 number, since 2×11222121001² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (11222121301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74821 + ... + 167458.

It is an arithmetic number, because the mean of its divisors is an integer number (864939600).

Almost surely, 2^11222121001 is an apocalyptic number.

It is an amenable number.

11222121001 is a deficient number, since it is larger than the sum of its proper divisors (2616912599).

11222121001 is a wasteful number, since it uses less digits than its factorization.

11222121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242808.

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

Adding to 11222121001 its reverse (10012122211), we get a palindrome (21234243212).

The spelling of 11222121001 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one".