20110222202221 has 2 divisors, whose sum is σ = 20110222202222. Its totient is φ = 20110222202220.

The previous prime is 20110222202201. The next prime is 20110222202269. The reversal of 20110222202221 is 12220222201102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15964132124196 + 4146090078025 = 3995514^2 + 2036195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110222202221 is a prime.

It is a super-3 number, since 3×20110222202221³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110222202201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055111101110 + 10055111101111.

It is an arithmetic number, because the mean of its divisors is an integer number (10055111101111).

Almost surely, 2^{20110222202221} is an apocalyptic number.

It is an amenable number.

20110222202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110222202221 is an equidigital number, since it uses as much as digits as its factorization.

20110222202221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20110222202221 its reverse (12220222201102), we get a palindrome (32330444403323).

The spelling of 20110222202221 in words is "twenty trillion, one hundred ten billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-one".