210021012010 has 32 divisors (see below), whose sum is σ = 384586648272. Its totient is φ = 82555630080.

The previous prime is 210021011947. The next prime is 210021012013. The reversal of 210021012010 is 10210120012.

It can be written as a sum of positive squares in 8 ways, for example, as 256096009 + 209764916001 = 16003^2 + 458001^2 .

It is a super-5 number, since 5×210021012010⁵ (a number of 58 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (210021012013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 512244 + ... + 826096.

Almost surely, 2^210021012010 is an apocalyptic number.

210021012010 is a deficient number, since it is larger than the sum of its proper divisors (174565636262).

210021012010 is a wasteful number, since it uses less digits than its factorization.

210021012010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315018.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210021012010 its reverse (10210120012), we get a palindrome (220231132022).

The spelling of 210021012010 in words is "two hundred ten billion, twenty-one million, twelve thousand, ten".