201212311 has 8 divisors (see below), whose sum is σ = 207000000. Its totient is φ = 195487488.

The previous prime is 201212279. The next prime is 201212339. The reversal of 201212311 is 113212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201212311 - 2⁵ = 201212279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201212291 and 201212300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9186 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (25875000).

Almost surely, 2^201212311 is an apocalyptic number.

201212311 is a deficient number, since it is larger than the sum of its proper divisors (5787689).

201212311 is a wasteful number, since it uses less digits than its factorization.

201212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31433.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 201212311 is about 14184.9325342069. The cubic root of 201212311 is about 585.9827744823.

Adding to 201212311 its reverse (113212102), we get a palindrome (314424413).

The spelling of 201212311 in words is "two hundred one million, two hundred twelve thousand, three hundred eleven".