21222202151 has 2 divisors, whose sum is σ = 21222202152. Its totient is φ = 21222202150.

The previous prime is 21222202109. The next prime is 21222202153. The reversal of 21222202151 is 15120222212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222202151 - 2⁶ = 21222202087 is a prime.

Together with 21222202153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222202153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611101075 + 10611101076.

It is an arithmetic number, because the mean of its divisors is an integer number (10611101076).

Almost surely, 2^21222202151 is an apocalyptic number.

21222202151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222202151 is an equidigital number, since it uses as much as digits as its factorization.

21222202151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 21222202151 its reverse (15120222212), we get a palindrome (36342424363).

The spelling of 21222202151 in words is "twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred fifty-one".