32221212181 has 2 divisors, whose sum is σ = 32221212182. Its totient is φ = 32221212180.

The previous prime is 32221212103. The next prime is 32221212197. The reversal of 32221212181 is 18121212223.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20458725156 + 11762487025 = 143034^2 + 108455^2 .

It is a cyclic number.

It is not a de Polignac number, because 32221212181 - 2¹⁵ = 32221179413 is a prime.

It is a super-2 number, since 2×32221212181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32221212281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16110606090 + 16110606091.

It is an arithmetic number, because the mean of its divisors is an integer number (16110606091).

Almost surely, 2^32221212181 is an apocalyptic number.

It is an amenable number.

32221212181 is a deficient number, since it is larger than the sum of its proper divisors (1).

32221212181 is an equidigital number, since it uses as much as digits as its factorization.

32221212181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

The spelling of 32221212181 in words is "thirty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred eighty-one".