221120351 has 2 divisors, whose sum is σ = 221120352. Its totient is φ = 221120350.

The previous prime is 221120299. The next prime is 221120353. The reversal of 221120351 is 153021122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221120351 is a prime.

Together with 221120353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221120353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560175 + 110560176.

It is an arithmetic number, because the mean of its divisors is an integer number (110560176).

Almost surely, 2^221120351 is an apocalyptic number.

221120351 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120351 is an equidigital number, since it uses as much as digits as its factorization.

221120351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221120351 is about 14870.1160385520. The cubic root of 221120351 is about 604.7040886078.

Adding to 221120351 its reverse (153021122), we get a palindrome (374141473).

It can be divided in two parts, 221 and 120351, that multiplied together give a triangular number (26597571 = T₇₂₉₃).

The spelling of 221120351 in words is "two hundred twenty-one million, one hundred twenty thousand, three hundred fifty-one".