21313331113212 has 36 divisors (see below), whose sum is σ = 54116958342720. Its totient is φ = 7072585209792.

The previous prime is 21313331113189. The next prime is 21313331113213. The reversal of 21313331113212 is 21231113331312.

21313331113212 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 3 + 331 + 1 + 1 + 321 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313331113213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1327429137 + ... + 1327445192.

Almost surely, 2^{21313331113212} is an apocalyptic number.

It is an amenable number.

21313331113212 is an abundant number, since it is smaller than the sum of its proper divisors (32803627229508).

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

21313331113212 is a wasteful number, since it uses less digits than its factorization.

21313331113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654874562 (or 2654874557 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

Adding to 21313331113212 its reverse (21231113331312), we get a palindrome (42544444444524).

The spelling of 21313331113212 in words is "twenty-one trillion, three hundred thirteen billion, three hundred thirty-one million, one hundred thirteen thousand, two hundred twelve".