21020002010212 has 12 divisors (see below), whose sum is σ = 36990506332080. Its totient is φ = 10451285915336.

The previous prime is 21020002010209. The next prime is 21020002010213. The reversal of 21020002010212 is 21201020002012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21020002010192 and 21020002010201.

It is not an unprimeable number, because it can be changed into a prime (21020002010213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14678771638 + ... + 14678773069.

It is an arithmetic number, because the mean of its divisors is an integer number (3082542194340).

Almost surely, 2^{21020002010212} is an apocalyptic number.

It is an amenable number.

21020002010212 is a deficient number, since it is larger than the sum of its proper divisors (15970504321868).

21020002010212 is a wasteful number, since it uses less digits than its factorization.

21020002010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29357544890 (or 29357544888 counting only the distinct ones).

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

Adding to 21020002010212 its reverse (21201020002012), we get a palindrome (42221022012224).

The spelling of 21020002010212 in words is "twenty-one trillion, twenty billion, two million, ten thousand, two hundred twelve".