21010300120 has 32 divisors (see below), whose sum is σ = 47939001120. Its totient is φ = 8285751040.

The previous prime is 21010300109. The next prime is 21010300159. The reversal of 21010300120 is 2100301012.

It is a super-2 number, since 2×21010300120² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 21010300097 and 21010300106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3696157 + ... + 3701836.

It is an arithmetic number, because the mean of its divisors is an integer number (1498093785).

Almost surely, 2^21010300120 is an apocalyptic number.

21010300120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010300120 is an abundant number, since it is smaller than the sum of its proper divisors (26928701000).

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

21010300120 is a wasteful number, since it uses less digits than its factorization.

21010300120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7398075 (or 7398071 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21010300120 its reverse (2100301012), we get a palindrome (23110601132).

The spelling of 21010300120 in words is "twenty-one billion, ten million, three hundred thousand, one hundred twenty".