221212002202151 has 2 divisors, whose sum is σ = 221212002202152. Its totient is φ = 221212002202150.

The previous prime is 221212002202091. The next prime is 221212002202183. The reversal of 221212002202151 is 151202200212122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221212002202151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221212002402151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606001101075 + 110606001101076.

It is an arithmetic number, because the mean of its divisors is an integer number (110606001101076).

Almost surely, 2^{221212002202151} is an apocalyptic number.

221212002202151 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212002202151 is an equidigital number, since it uses as much as digits as its factorization.

221212002202151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 221212002202151 its reverse (151202200212122), we get a palindrome (372414202414273).

The spelling of 221212002202151 in words is "two hundred twenty-one trillion, two hundred twelve billion, two million, two hundred two thousand, one hundred fifty-one".