21210100424012 has 48 divisors (see below), whose sum is σ = 39430918410240. Its totient is φ = 9954609400512.

The previous prime is 21210100424011. The next prime is 21210100424027. The reversal of 21210100424012 is 21042400101212.

It is a super-2 number, since 2×21210100424012² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21210100424011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5855123 + ... + 8758005.

It is an arithmetic number, because the mean of its divisors is an integer number (821477466880).

Almost surely, 2^{21210100424012} is an apocalyptic number.

It is an amenable number.

21210100424012 is a deficient number, since it is larger than the sum of its proper divisors (18220817986228).

21210100424012 is a wasteful number, since it uses less digits than its factorization.

21210100424012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903790 (or 2903788 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21210100424012 its reverse (21042400101212), we get a palindrome (42252500525224).

The spelling of 21210100424012 in words is "twenty-one trillion, two hundred ten billion, one hundred million, four hundred twenty-four thousand, twelve".