21212310322212 has 36 divisors (see below), whose sum is σ = 51260981409456. Its totient is φ = 6826950445280.

The previous prime is 21212310322169. The next prime is 21212310322337. The reversal of 21212310322212 is 21222301321212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1050936714 + ... + 1050956897.

Almost surely, 2^{21212310322212} is an apocalyptic number.

It is an amenable number.

21212310322212 is an abundant number, since it is smaller than the sum of its proper divisors (30048671087244).

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

21212310322212 is a wasteful number, since it uses less digits than its factorization.

21212310322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101893676 (or 2101893645 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21212310322212 its reverse (21222301321212), we get a palindrome (42434611643424).

The spelling of 21212310322212 in words is "twenty-one trillion, two hundred twelve billion, three hundred ten million, three hundred twenty-two thousand, two hundred twelve".