22011000012221 has 4 divisors (see below), whose sum is σ = 24012000013344. Its totient is φ = 20010000011100.

The previous prime is 22011000012161. The next prime is 22011000012241. The reversal of 22011000012221 is 12221000011022.

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 de Polignac number, because none of the positive numbers 2^k-22011000012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011000012196 and 22011000012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011000012241) 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, 1000500000545 + ... + 1000500000566.

It is an arithmetic number, because the mean of its divisors is an integer number (6003000003336).

Almost surely, 2^{22011000012221} is an apocalyptic number.

It is an amenable number.

22011000012221 is a deficient number, since it is larger than the sum of its proper divisors (2001000001123).

22011000012221 is a wasteful number, since it uses less digits than its factorization.

22011000012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001000001122.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22011000012221 its reverse (12221000011022), we get a palindrome (34232000023243).

The spelling of 22011000012221 in words is "twenty-two trillion, eleven billion, twelve thousand, two hundred twenty-one".