21010310010 has 64 divisors (see below), whose sum is σ = 58976323200. Its totient is φ = 5307866496.

The previous prime is 21010309987. The next prime is 21010310017. The reversal of 21010310010 is 1001301012.

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 = 21010309974 and 21010310001.

It is not an unprimeable number, because it can be changed into a prime (21010310017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2042659 + ... + 2052918.

It is an arithmetic number, because the mean of its divisors is an integer number (921505050).

Almost surely, 2^21010310010 is an apocalyptic number.

21010310010 is an abundant number, since it is smaller than the sum of its proper divisors (37966013190).

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

21010310010 is a wasteful number, since it uses less digits than its factorization.

21010310010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095612 (or 4095606 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 21010310010 its reverse (1001301012), we get a palindrome (22011611022).

The spelling of 21010310010 in words is "twenty-one billion, ten million, three hundred ten thousand, ten".