372111221 has 2 divisors, whose sum is σ = 372111222. Its totient is φ = 372111220.

The previous prime is 372111191. The next prime is 372111241. The reversal of 372111221 is 122111273.

It is an a-pointer prime, because the next prime (372111241) can be obtained adding 372111221 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310252996 + 61858225 = 17614^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 372111221 - 2¹⁰ = 372110197 is a prime.

It is a super-2 number, since 2×372111221² = 276933521588221682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 372111193 and 372111202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (372111241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186055610 + 186055611.

It is an arithmetic number, because the mean of its divisors is an integer number (186055611).

Almost surely, 2^372111221 is an apocalyptic number.

It is an amenable number.

372111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

372111221 is an equidigital number, since it uses as much as digits as its factorization.

372111221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 20.

The square root of 372111221 is about 19290.1845766182. The cubic root of 372111221 is about 719.2683030929.

Adding to 372111221 its reverse (122111273), we get a palindrome (494222494).

The spelling of 372111221 in words is "three hundred seventy-two million, one hundred eleven thousand, two hundred twenty-one".