221014961 has 2 divisors, whose sum is σ = 221014962. Its totient is φ = 221014960.

The previous prime is 221014957. The next prime is 221014993. The reversal of 221014961 is 169410122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210250000 + 10764961 = 14500^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 221014961 - 2² = 221014957 is a prime.

It is a super-2 number, since 2×221014961² = 97695225971663042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221014961.

It is not a weakly prime, because it can be changed into another prime (221014901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110507480 + 110507481.

It is an arithmetic number, because the mean of its divisors is an integer number (110507481).

Almost surely, 2^221014961 is an apocalyptic number.

It is an amenable number.

221014961 is a deficient number, since it is larger than the sum of its proper divisors (1).

221014961 is an equidigital number, since it uses as much as digits as its factorization.

221014961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 221014961 is about 14866.5719316862. The cubic root of 221014961 is about 604.6080023344.

It can be divided in two parts, 2210 and 14961, that added together give a palindrome (17171).

The spelling of 221014961 in words is "two hundred twenty-one million, fourteen thousand, nine hundred sixty-one".