11212211001 has 16 divisors (see below), whose sum is σ = 15317527680. Its totient is φ = 7290929280.

The previous prime is 11212210981. The next prime is 11212211009. The reversal of 11212211001 is 10011221211.

It is not a de Polignac number, because 11212211001 - 2⁶ = 11212210937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11212211009) 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, 933631 + ... + 945563.

It is an arithmetic number, because the mean of its divisors is an integer number (957345480).

Almost surely, 2^11212211001 is an apocalyptic number.

It is an amenable number.

11212211001 is a deficient number, since it is larger than the sum of its proper divisors (4105316679).

11212211001 is a wasteful number, since it uses less digits than its factorization.

11212211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11212211001 its reverse (10011221211), we get a palindrome (21223432212).

It can be divided in two parts, 1121 and 2211001, that added together give a palindrome (2212122).

The spelling of 11212211001 in words is "eleven billion, two hundred twelve million, two hundred eleven thousand, one".