21202100012212 has 12 divisors (see below), whose sum is σ = 42404200024480. Its totient is φ = 9086614290936.

The previous prime is 21202100012167. The next prime is 21202100012239. The reversal of 21202100012212 is 21221000120212.

It is a happy number.

21202100012212 is an admirable number.

It is a super-3 number, since 3×21202100012212³ (a number of 41 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 378608928762 + ... + 378608928817.

Almost surely, 2^{21202100012212} is an apocalyptic number.

It is an amenable number.

21202100012212 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.

21202100012212 is a wasteful number, since it uses less digits than its factorization.

21202100012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757217857590 (or 757217857588 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202100012212 its reverse (21221000120212), we get a palindrome (42423100132424).

The spelling of 21202100012212 in words is "twenty-one trillion, two hundred two billion, one hundred million, twelve thousand, two hundred twelve".