87226121 has 2 divisors, whose sum is σ = 87226122. Its totient is φ = 87226120.

The previous prime is 87226109. The next prime is 87226123. The reversal of 87226121 is 12162278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61011721 + 26214400 = 7811^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 87226121 - 2¹⁸ = 86963977 is a prime.

Together with 87226123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87226123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43613060 + 43613061.

It is an arithmetic number, because the mean of its divisors is an integer number (43613061).

Almost surely, 2^87226121 is an apocalyptic number.

It is an amenable number.

87226121 is a deficient number, since it is larger than the sum of its proper divisors (1).

87226121 is an equidigital number, since it uses as much as digits as its factorization.

87226121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 87226121 is about 9339.4925451012. The cubic root of 87226121 is about 443.4883200677.

Adding to 87226121 its reverse (12162278), we get a palindrome (99388399).

The spelling of 87226121 in words is "eighty-seven million, two hundred twenty-six thousand, one hundred twenty-one".