21223330151 has 2 divisors, whose sum is σ = 21223330152. Its totient is φ = 21223330150.

The previous prime is 21223330091. The next prime is 21223330169. The reversal of 21223330151 is 15103332212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223330151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223330181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611665075 + 10611665076.

It is an arithmetic number, because the mean of its divisors is an integer number (10611665076).

Almost surely, 2^21223330151 is an apocalyptic number.

21223330151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223330151 is an equidigital number, since it uses as much as digits as its factorization.

21223330151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 21223330151 its reverse (15103332212), we get a palindrome (36326662363).

The spelling of 21223330151 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty thousand, one hundred fifty-one".