221220112151 has 2 divisors, whose sum is σ = 221220112152. Its totient is φ = 221220112150.

The previous prime is 221220112103. The next prime is 221220112163. The reversal of 221220112151 is 151211022122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221220112151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220114151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610056075 + 110610056076.

It is an arithmetic number, because the mean of its divisors is an integer number (110610056076).

Almost surely, 2^221220112151 is an apocalyptic number.

221220112151 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220112151 is an equidigital number, since it uses as much as digits as its factorization.

221220112151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 221220112151 its reverse (151211022122), we get a palindrome (372431134273).

The spelling of 221220112151 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, one hundred fifty-one".