21010110012010 has 256 divisors, whose sum is σ = 47098630656000. Its totient is φ = 6587730155520.

The previous prime is 21010110011993. The next prime is 21010110012011. The reversal of 21010110012010 is 1021001101012.

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

It is not an unprimeable number, because it can be changed into a prime (21010110012011) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2326954176 + ... + 2326963204.

It is an arithmetic number, because the mean of its divisors is an integer number (183979026000).

Almost surely, 2^{21010110012010} is an apocalyptic number.

21010110012010 is an abundant number, since it is smaller than the sum of its proper divisors (26088520643990).

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

21010110012010 is a wasteful number, since it uses less digits than its factorization.

21010110012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9549.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21010110012010 its reverse (1021001101012), we get a palindrome (22031111113022).

The spelling of 21010110012010 in words is "twenty-one trillion, ten billion, one hundred ten million, twelve thousand, ten".