21020210010212 has 24 divisors (see below), whose sum is σ = 43396562603520. Its totient is φ = 8718059450880.

The previous prime is 21020210010193. The next prime is 21020210010221. The reversal of 21020210010212 is 21201001202012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12108415037 + ... + 12108416772.

It is an arithmetic number, because the mean of its divisors is an integer number (1808190108480).

Almost surely, 2^{21020210010212} is an apocalyptic number.

It is an amenable number.

21020210010212 is an abundant number, since it is smaller than the sum of its proper divisors (22376352593308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21020210010212 is a wasteful number, since it uses less digits than its factorization.

21020210010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24216831851 (or 24216831849 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21020210010212 its reverse (21201001202012), we get a palindrome (42221211212224).

The spelling of 21020210010212 in words is "twenty-one trillion, twenty billion, two hundred ten million, ten thousand, two hundred twelve".