21340420022212 has 24 divisors (see below), whose sum is σ = 39542747328504. Its totient is φ = 10042498701312.

The previous prime is 21340420022189. The next prime is 21340420022219. The reversal of 21340420022212 is 21222002404312.

It can be written as a sum of positive squares in 4 ways, for example, as 5527501932096 + 15812918090116 = 2351064^2 + 3976546^2 .

It is not an unprimeable number, because it can be changed into a prime (21340420022219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14575368 + ... + 15972544.

It is an arithmetic number, because the mean of its divisors is an integer number (1647614472021).

Almost surely, 2^{21340420022212} is an apocalyptic number.

It is an amenable number.

21340420022212 is a deficient number, since it is larger than the sum of its proper divisors (18202327306292).

21340420022212 is a wasteful number, since it uses less digits than its factorization.

21340420022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621815 (or 1621813 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21340420022212 its reverse (21222002404312), we get a palindrome (42562422426524).

The spelling of 21340420022212 in words is "twenty-one trillion, three hundred forty billion, four hundred twenty million, twenty-two thousand, two hundred twelve".