212440133321 has 6 divisors (see below), whose sum is σ = 230038724430. Its totient is φ = 196098584448.

The previous prime is 212440133309. The next prime is 212440133387. The reversal of 212440133321 is 123331044212.

It can be written as a sum of positive squares in 3 ways, for example, as 7914593296 + 204525540025 = 88964^2 + 452245^2 .

It is not a de Polignac number, because 212440133321 - 2¹⁰ = 212440132297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212440133821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 628520936 + ... + 628521273.

It is an arithmetic number, because the mean of its divisors is an integer number (38339787405).

Almost surely, 2^212440133321 is an apocalyptic number.

It is an amenable number.

212440133321 is a deficient number, since it is larger than the sum of its proper divisors (17598591109).

212440133321 is a wasteful number, since it uses less digits than its factorization.

212440133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257042235 (or 1257042222 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 212440133321 its reverse (123331044212), we get a palindrome (335771177533).

The spelling of 212440133321 in words is "two hundred twelve billion, four hundred forty million, one hundred thirty-three thousand, three hundred twenty-one".