212061321 has 40 divisors (see below), whose sum is σ = 329940864. Its totient is φ = 135626400.

The previous prime is 212061301. The next prime is 212061323. The reversal of 212061321 is 123160212.

It is not a de Polignac number, because 212061321 - 2¹⁰ = 212060297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212061294 and 212061303.

It is not an unprimeable number, because it can be changed into a prime (212061323) 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 39 ways as a sum of consecutive naturals, for example, 201246 + ... + 202296.

Almost surely, 2^212061321 is an apocalyptic number.

It is an amenable number.

212061321 is a deficient number, since it is larger than the sum of its proper divisors (117879543).

212061321 is a wasteful number, since it uses less digits than its factorization.

212061321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 212061321 is about 14562.3253980949. The cubic root of 212061321 is about 596.3306809062.

The spelling of 212061321 in words is "two hundred twelve million, sixty-one thousand, three hundred twenty-one".