11000012212221 has 4 divisors (see below), whose sum is σ = 14666682949632. Its totient is φ = 7333341474812.

The previous prime is 11000012212193. The next prime is 11000012212229. The reversal of 11000012212221 is 12221221000011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11000012212221 - 2¹⁸ = 11000011950077 is a prime.

It is a super-2 number, since 2×11000012212221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11000012212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000012212229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833335368701 + ... + 1833335368706.

It is an arithmetic number, because the mean of its divisors is an integer number (3666670737408).

Almost surely, 2^{11000012212221} is an apocalyptic number.

It is an amenable number.

11000012212221 is a deficient number, since it is larger than the sum of its proper divisors (3666670737411).

11000012212221 is an equidigital number, since it uses as much as digits as its factorization.

11000012212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666670737410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11000012212221 its reverse (12221221000011), we get a palindrome (23221233212232).

The spelling of 11000012212221 in words is "eleven trillion, twelve million, two hundred twelve thousand, two hundred twenty-one".