210020021012 has 12 divisors (see below), whose sum is σ = 367629862740. Its totient is φ = 104982917376.

The previous prime is 210020021009. The next prime is 210020021027. The reversal of 210020021012 is 210120020012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 157121860996 + 52898160016 = 396386^2 + 229996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210020020984 and 210020021002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6755837 + ... + 6786852.

It is an arithmetic number, because the mean of its divisors is an integer number (30635821895).

Almost surely, 2^210020021012 is an apocalyptic number.

It is an amenable number.

210020021012 is a deficient number, since it is larger than the sum of its proper divisors (157609841728).

210020021012 is a wasteful number, since it uses less digits than its factorization.

210020021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13546570 (or 13546568 counting only the distinct ones).

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

Adding to 210020021012 its reverse (210120020012), we get a palindrome (420140041024).

It can be divided in two parts, 2100200 and 21012, that added together give a palindrome (2121212).

The spelling of 210020021012 in words is "two hundred ten billion, twenty million, twenty-one thousand, twelve".