21210020002012 has 48 divisors (see below), whose sum is σ = 37624719132000. Its totient is φ = 10460980224000.

The previous prime is 21210020002007. The next prime is 21210020002013. The reversal of 21210020002012 is 21020002001212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21210020001983 and 21210020002001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210020002013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883702012 + ... + 883726012.

It is an arithmetic number, because the mean of its divisors is an integer number (783848315250).

Almost surely, 2^{21210020002012} is an apocalyptic number.

It is an amenable number.

21210020002012 is a deficient number, since it is larger than the sum of its proper divisors (16414699129988).

21210020002012 is a wasteful number, since it uses less digits than its factorization.

21210020002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33046 (or 33044 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21210020002012 its reverse (21020002001212), we get a palindrome (42230022003224).

The spelling of 21210020002012 in words is "twenty-one trillion, two hundred ten billion, twenty million, two thousand, twelve".