21112200001212 has 24 divisors (see below), whose sum is σ = 49713743125200. Its totient is φ = 6972836697216.

The previous prime is 21112200001169. The next prime is 21112200001213. The reversal of 21112200001212 is 21210000221112.

It is a super-3 number, since 3×21112200001212³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112200001191 and 21112200001200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112200001213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8070411537 + ... + 8070414152.

It is an arithmetic number, because the mean of its divisors is an integer number (2071405963550).

Almost surely, 2^{21112200001212} is an apocalyptic number.

It is an amenable number.

21112200001212 is an abundant number, since it is smaller than the sum of its proper divisors (28601543123988).

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

21112200001212 is a wasteful number, since it uses less digits than its factorization.

21112200001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140825805 (or 16140825803 counting only the distinct ones).

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

Adding to 21112200001212 its reverse (21210000221112), we get a palindrome (42322200222324).

The spelling of 21112200001212 in words is "twenty-one trillion, one hundred twelve billion, two hundred million, one thousand, two hundred twelve".