21220002222151 has 2 divisors, whose sum is σ = 21220002222152. Its totient is φ = 21220002222150.

The previous prime is 21220002222149. The next prime is 21220002222257. The reversal of 21220002222151 is 15122220002212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220002222151 - 2¹ = 21220002222149 is a prime.

Together with 21220002222149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220000222151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610001111075 + 10610001111076.

It is an arithmetic number, because the mean of its divisors is an integer number (10610001111076).

Almost surely, 2^{21220002222151} is an apocalyptic number.

21220002222151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220002222151 is an equidigital number, since it uses as much as digits as its factorization.

21220002222151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21220002222151 its reverse (15122220002212), we get a palindrome (36342222224363).

The spelling of 21220002222151 in words is "twenty-one trillion, two hundred twenty billion, two million, two hundred twenty-two thousand, one hundred fifty-one".