201212013321 has 72 divisors (see below), whose sum is σ = 334868902368. Its totient is φ = 116204457600.

The previous prime is 201212013307. The next prime is 201212013329. The reversal of 201212013321 is 123310212102.

201212013321 is a `hidden beast` number, since 20 + 121 + 201 + 3 + 321 = 666.

It is not a de Polignac number, because 201212013321 - 2¹⁰ = 201212012297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201212013294 and 201212013303.

It is not an unprimeable number, because it can be changed into a prime (201212013329) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1867506 + ... + 1972308.

Almost surely, 2^201212013321 is an apocalyptic number.

It is an amenable number.

201212013321 is a deficient number, since it is larger than the sum of its proper divisors (133656889047).

201212013321 is a wasteful number, since it uses less digits than its factorization.

201212013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104915 (or 104901 counting only the distinct ones).

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

Adding to 201212013321 its reverse (123310212102), we get a palindrome (324522225423).

The spelling of 201212013321 in words is "two hundred one billion, two hundred twelve million, thirteen thousand, three hundred twenty-one".