21120210010212 has 72 divisors (see below), whose sum is σ = 51886900722720. Its totient is φ = 6685533824640.

The previous prime is 21120210010199. The next prime is 21120210010217. The reversal of 21120210010212 is 21201001202112.

It is a junction number, because it is equal to n+sod(n) for n = 21120210010191 and 21120210010200.

It is not an unprimeable number, because it can be changed into a prime (21120210010217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11085489 + ... + 12850232.

Almost surely, 2^{21120210010212} is an apocalyptic number.

It is an amenable number.

21120210010212 is an abundant number, since it is smaller than the sum of its proper divisors (30766690712508).

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

21120210010212 is a wasteful number, since it uses less digits than its factorization.

21120210010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23935913 (or 23935888 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120210010212 its reverse (21201001202112), we get a palindrome (42321211212324).

The spelling of 21120210010212 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, ten thousand, two hundred twelve".