212221221151 has 2 divisors, whose sum is σ = 212221221152. Its totient is φ = 212221221150.

The previous prime is 212221221013. The next prime is 212221221253. The reversal of 212221221151 is 151122122212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212221221151 - 2²¹ = 212219123999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221221851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110610575 + 106110610576.

It is an arithmetic number, because the mean of its divisors is an integer number (106110610576).

Almost surely, 2^212221221151 is an apocalyptic number.

212221221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221221151 is an equidigital number, since it uses as much as digits as its factorization.

212221221151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 22.

Adding to 212221221151 its reverse (151122122212), we get a palindrome (363343343363).

The spelling of 212221221151 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred fifty-one".