22120022211221 has 4 divisors (see below), whose sum is σ = 24130933321344. Its totient is φ = 20109111101100.

The previous prime is 22120022211181. The next prime is 22120022211233. The reversal of 22120022211221 is 12211222002122.

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 a de Polignac number, because none of the positive numbers 2^k-22120022211221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120022211193 and 22120022211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120022291221) 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, 1005455555045 + ... + 1005455555066.

It is an arithmetic number, because the mean of its divisors is an integer number (6032733330336).

Almost surely, 2^{22120022211221} is an apocalyptic number.

It is an amenable number.

22120022211221 is a deficient number, since it is larger than the sum of its proper divisors (2010911110123).

22120022211221 is a wasteful number, since it uses less digits than its factorization.

22120022211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010911110122.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22120022211221 its reverse (12211222002122), we get a palindrome (34331244213343).

The spelling of 22120022211221 in words is "twenty-two trillion, one hundred twenty billion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".