119211221 has 2 divisors, whose sum is σ = 119211222. Its totient is φ = 119211220.

The previous prime is 119211163. The next prime is 119211227. The reversal of 119211221 is 122112911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67010596 + 52200625 = 8186^2 + 7225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-119211221 is a prime.

It is a super-2 number, since 2×119211221² = 28422630424621682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 119211193 and 119211202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119211227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59605610 + 59605611.

It is an arithmetic number, because the mean of its divisors is an integer number (59605611).

Almost surely, 2^119211221 is an apocalyptic number.

It is an amenable number.

119211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

119211221 is an equidigital number, since it uses as much as digits as its factorization.

119211221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 20.

The square root of 119211221 is about 10918.3891211112. The cubic root of 119211221 is about 492.1593181028.

It can be divided in two parts, 11921 and 1221, that multiplied together give a palindrome (14555541).

The spelling of 119211221 in words is "one hundred nineteen million, two hundred eleven thousand, two hundred twenty-one".