22120012011221 has 4 divisors (see below), whose sum is σ = 22294185334272. Its totient is φ = 21945838688172.

The previous prime is 22120012011211. The next prime is 22120012011233. The reversal of 22120012011221 is 12211021002122.

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 22120012011221 - 2³⁰ = 22118938269397 is a prime.

It is a super-2 number, since 2×22120012011221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22120012011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120012011211) 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, 87086661335 + ... + 87086661588.

It is an arithmetic number, because the mean of its divisors is an integer number (5573546333568).

Almost surely, 2^{22120012011221} is an apocalyptic number.

It is an amenable number.

22120012011221 is a deficient number, since it is larger than the sum of its proper divisors (174173323051).

22120012011221 is a wasteful number, since it uses less digits than its factorization.

22120012011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174173323050.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22120012011221 its reverse (12211021002122), we get a palindrome (34331033013343).

The spelling of 22120012011221 in words is "twenty-two trillion, one hundred twenty billion, twelve million, eleven thousand, two hundred twenty-one".