21213030113212 has 12 divisors (see below), whose sum is σ = 42426060226480. Its totient is φ = 9091298619936.

The previous prime is 21213030113161. The next prime is 21213030113227. The reversal of 21213030113212 is 21231103031212.

21213030113212 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378804109137 + ... + 378804109192.

Almost surely, 2^{21213030113212} is an apocalyptic number.

It is an amenable number.

21213030113212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21213030113212 is a wasteful number, since it uses less digits than its factorization.

21213030113212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757608218340 (or 757608218338 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21213030113212 its reverse (21231103031212), we get a palindrome (42444133144424).

The spelling of 21213030113212 in words is "twenty-one trillion, two hundred thirteen billion, thirty million, one hundred thirteen thousand, two hundred twelve".