21242340412210 has 32 divisors (see below), whose sum is σ = 38419146177984. Its totient is φ = 8456287896000.

The previous prime is 21242340412171. The next prime is 21242340412211. The reversal of 21242340412210 is 1221404324212.

It is a super-3 number, since 3×21242340412210³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21242340412211) 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 15 ways as a sum of consecutive naturals, for example, 49542445 + ... + 49969375.

It is an arithmetic number, because the mean of its divisors is an integer number (1200598318062).

Almost surely, 2^{21242340412210} is an apocalyptic number.

21242340412210 is a deficient number, since it is larger than the sum of its proper divisors (17176805765774).

21242340412210 is a wasteful number, since it uses less digits than its factorization.

21242340412210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450730.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21242340412210 its reverse (1221404324212), we get a palindrome (22463744736422).

The spelling of 21242340412210 in words is "twenty-one trillion, two hundred forty-two billion, three hundred forty million, four hundred twelve thousand, two hundred ten".