21231010013010 has 256 divisors, whose sum is σ = 61552994549760. Its totient is φ = 4581691994880.

The previous prime is 21231010012999. The next prime is 21231010013023. The reversal of 21231010013010 is 1031001013212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1794517795 + ... + 1794529625.

It is an arithmetic number, because the mean of its divisors is an integer number (240441384960).

Almost surely, 2^{21231010013010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21231010013010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30776497274880).

21231010013010 is an abundant number, since it is smaller than the sum of its proper divisors (40321984536750).

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

21231010013010 is a wasteful number, since it uses less digits than its factorization.

21231010013010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16653.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21231010013010 its reverse (1031001013212), we get a palindrome (22262011026222).

The spelling of 21231010013010 in words is "twenty-one trillion, two hundred thirty-one billion, ten million, thirteen thousand, ten".