11222211221001 has 36 divisors (see below), whose sum is σ = 18299002910916. Its totient is φ = 6617520106560.

The previous prime is 11222211220981. The next prime is 11222211221057. The reversal of 11222211221001 is 10012211222211.

11222211221001 is a `hidden beast` number, since 11 + 222 + 211 + 221 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10555669604601 + 666541616400 = 3248949^2 + 816420^2 .

It is not a de Polignac number, because 11222211221001 - 2¹⁵ = 11222211188233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11222211221801) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 139217286 + ... + 139297871.

Almost surely, 2^{11222211221001} is an apocalyptic number.

11222211221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222211221001 is a deficient number, since it is larger than the sum of its proper divisors (7076791689915).

11222211221001 is a wasteful number, since it uses less digits than its factorization.

11222211221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278515222 (or 278515208 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11222211221001 its reverse (10012211222211), we get a palindrome (21234422443212).

The spelling of 11222211221001 in words is "eleven trillion, two hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, one".