21000002102212 has 96 divisors (see below), whose sum is σ = 43473001936896. Its totient is φ = 8685973094400.

The previous prime is 21000002102207. The next prime is 21000002102231. The reversal of 21000002102212 is 21220120000012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21000002102192 and 21000002102201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487930758 + ... + 487973794.

It is an arithmetic number, because the mean of its divisors is an integer number (452843770176).

Almost surely, 2^{21000002102212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000002102212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21736500968448).

21000002102212 is an abundant number, since it is smaller than the sum of its proper divisors (22472999834684).

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

21000002102212 is a wasteful number, since it uses less digits than its factorization.

21000002102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44597 (or 44595 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21000002102212 its reverse (21220120000012), we get a palindrome (42220122102224).

The spelling of 21000002102212 in words is "twenty-one trillion, two million, one hundred two thousand, two hundred twelve".