210120021010 has 32 divisors (see below), whose sum is σ = 378840748032. Its totient is φ = 83909286720.

The previous prime is 210120020963. The next prime is 210120021017. The reversal of 210120021010 is 10120021012.

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 (210120021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22355632 + ... + 22365028.

It is an arithmetic number, because the mean of its divisors is an integer number (11838773376).

Almost surely, 2^210120021010 is an apocalyptic number.

210120021010 is a deficient number, since it is larger than the sum of its proper divisors (168720727022).

210120021010 is a wasteful number, since it uses less digits than its factorization.

210120021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12858.

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

Adding to 210120021010 its reverse (10120021012), we get a palindrome (220240042022).

The spelling of 210120021010 in words is "two hundred ten billion, one hundred twenty million, twenty-one thousand, ten".