211221221100151 has 2 divisors, whose sum is σ = 211221221100152. Its totient is φ = 211221221100150.

The previous prime is 211221221100137. The next prime is 211221221100179. The reversal of 211221221100151 is 151001122122112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211221221100151 is a prime.

It is a super-2 number, since 2×211221221100151² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211221221100181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610610550075 + 105610610550076.

It is an arithmetic number, because the mean of its divisors is an integer number (105610610550076).

Almost surely, 2^{211221221100151} is an apocalyptic number.

211221221100151 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221221100151 is an equidigital number, since it uses as much as digits as its factorization.

211221221100151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 22.

Adding to 211221221100151 its reverse (151001122122112), we get a palindrome (362222343222263).

The spelling of 211221221100151 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, one hundred fifty-one".