210021002012 has 24 divisors (see below), whose sum is σ = 386912937600. Its totient is φ = 99475366896.

The previous prime is 210021001987. The next prime is 210021002017. The reversal of 210021002012 is 210200120012.

It is a happy number.

It is a super-2 number, since 2×210021002012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210021001984 and 210021002002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021002017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860039 + ... + 1076897.

It is an arithmetic number, because the mean of its divisors is an integer number (16121372400).

Almost surely, 2^210021002012 is an apocalyptic number.

It is an amenable number.

210021002012 is a deficient number, since it is larger than the sum of its proper divisors (176891935588).

210021002012 is a wasteful number, since it uses less digits than its factorization.

210021002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229625 (or 229623 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210021002012 its reverse (210200120012), we get a palindrome (420221122024).

The spelling of 210021002012 in words is "two hundred ten billion, twenty-one million, two thousand, twelve".