22160426551221 has 16 divisors (see below), whose sum is σ = 35754637797504. Its totient is φ = 11918212598784.

The previous prime is 22160426551217. The next prime is 22160426551283. The reversal of 22160426551221 is 12215562406122.

It is not a de Polignac number, because 22160426551221 - 2² = 22160426551217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22160426551221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22160426551201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31037011620 + ... + 31037012333.

It is an arithmetic number, because the mean of its divisors is an integer number (2234664862344).

Almost surely, 2^{22160426551221} is an apocalyptic number.

22160426551221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22160426551221 is a deficient number, since it is larger than the sum of its proper divisors (13594211246283).

22160426551221 is a wasteful number, since it uses less digits than its factorization.

22160426551221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62074023980.

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 22160426551221 its reverse (12215562406122), we get a palindrome (34375988957343).

The spelling of 22160426551221 in words is "twenty-two trillion, one hundred sixty billion, four hundred twenty-six million, five hundred fifty-one thousand, two hundred twenty-one".