201012022122221 has 2 divisors, whose sum is σ = 201012022122222. Its totient is φ = 201012022122220.

The previous prime is 201012022122187. The next prime is 201012022122337. The reversal of 201012022122221 is 122221220210102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131517891015625 + 69494131106596 = 11468125^2 + 8336314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201012022122221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201012022122193 and 201012022122202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201012022122521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506011061110 + 100506011061111.

It is an arithmetic number, because the mean of its divisors is an integer number (100506011061111).

Almost surely, 2^{201012022122221} is an apocalyptic number.

It is an amenable number.

201012022122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012022122221 is an equidigital number, since it uses as much as digits as its factorization.

201012022122221 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 20.

Adding to 201012022122221 its reverse (122221220210102), we get a palindrome (323233242332323).

The spelling of 201012022122221 in words is "two hundred one trillion, twelve billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".