21010403010 has 128 divisors (see below), whose sum is σ = 52579528704. Its totient is φ = 5368688640.

The previous prime is 21010402993. The next prime is 21010403017. The reversal of 21010403010 is 1030401012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21010403017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23956692 + ... + 23957568.

It is an arithmetic number, because the mean of its divisors is an integer number (410777568).

Almost surely, 2^21010403010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010403010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26289764352).

21010403010 is an abundant number, since it is smaller than the sum of its proper divisors (31569125694).

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

21010403010 is a wasteful number, since it uses less digits than its factorization.

21010403010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21010403010 its reverse (1030401012), we get a palindrome (22040804022).

The spelling of 21010403010 in words is "twenty-one billion, ten million, four hundred three thousand, ten".