201311221302 has 48 divisors (see below), whose sum is σ = 436944641328. Its totient is φ = 66985327680.

The previous prime is 201311221289. The next prime is 201311221327. The reversal of 201311221302 is 203122113102.

201311221302 is a `hidden beast` number, since 201 + 311 + 22 + 130 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47331808 + ... + 47336060.

It is an arithmetic number, because the mean of its divisors is an integer number (9103013361).

Almost surely, 2^201311221302 is an apocalyptic number.

201311221302 is an abundant number, since it is smaller than the sum of its proper divisors (235633420026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201311221302 is a wasteful number, since it uses less digits than its factorization.

201311221302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8285 (or 8282 counting only the distinct ones).

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

Adding to 201311221302 its reverse (203122113102), we get a palindrome (404433334404).

The spelling of 201311221302 in words is "two hundred one billion, three hundred eleven million, two hundred twenty-one thousand, three hundred two".