212132221313 has 4 divisors (see below), whose sum is σ = 212134605780. Its totient is φ = 212129836848.

The previous prime is 212132221237. The next prime is 212132221321. The reversal of 212132221313 is 313122231212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69072775489 + 143059445824 = 262817^2 + 378232^2 .

It is a cyclic number.

It is not a de Polignac number, because 212132221313 - 2⁸ = 212132221057 is a prime.

It is a super-3 number, since 3×212132221313³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212132221013) 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 in 3 ways as a sum of consecutive naturals, for example, 1053398 + ... + 1238511.

It is an arithmetic number, because the mean of its divisors is an integer number (53033651445).

Almost surely, 2^212132221313 is an apocalyptic number.

It is an amenable number.

212132221313 is a deficient number, since it is larger than the sum of its proper divisors (2384467).

212132221313 is an equidigital number, since it uses as much as digits as its factorization.

212132221313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384466.

The product of its digits is 864, while the sum is 23.

Adding to 212132221313 its reverse (313122231212), we get a palindrome (525254452525).

The spelling of 212132221313 in words is "two hundred twelve billion, one hundred thirty-two million, two hundred twenty-one thousand, three hundred thirteen".