210120101010 has 24 divisors (see below), whose sum is σ = 546312262860. Its totient is φ = 56032026912.

The previous prime is 210120100969. The next prime is 210120101057. The reversal of 210120101010 is 10101021012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 198606596409 + 11513504601 = 445653^2 + 107301^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210120100983 and 210120101001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1167333805 + ... + 1167333984.

Almost surely, 2^210120101010 is an apocalyptic number.

210120101010 is an abundant number, since it is smaller than the sum of its proper divisors (336192161850).

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

210120101010 is a wasteful number, since it uses less digits than its factorization.

210120101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334667802 (or 2334667799 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210120101010 its reverse (10101021012), we get a palindrome (220221122022).

The spelling of 210120101010 in words is "two hundred ten billion, one hundred twenty million, one hundred one thousand, ten".