11699221 has 2 divisors, whose sum is σ = 11699222. Its totient is φ = 11699220.

The previous prime is 11699173. The next prime is 11699243. The reversal of 11699221 is 12299611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 2002225 = 3114^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 11699221 - 2²¹ = 9602069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11699291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5849610 + 5849611.

It is an arithmetic number, because the mean of its divisors is an integer number (5849611).

Almost surely, 2^11699221 is an apocalyptic number.

It is an amenable number.

11699221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11699221 is an equidigital number, since it uses as much as digits as its factorization.

11699221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 31.

The square root of 11699221 is about 3420.4124020358. The cubic root of 11699221 is about 227.0138295572.

The spelling of 11699221 in words is "eleven million, six hundred ninety-nine thousand, two hundred twenty-one".