21113010135210 has 256 divisors, whose sum is σ = 58683444019200. Its totient is φ = 4761781530624.

The previous prime is 21113010135199. The next prime is 21113010135277. The reversal of 21113010135210 is 1253101031112.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 127 ways as a sum of consecutive naturals, for example, 8735211922 + ... + 8735214338.

It is an arithmetic number, because the mean of its divisors is an integer number (229232203200).

Almost surely, 2^{21113010135210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21113010135210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29341722009600).

21113010135210 is an abundant number, since it is smaller than the sum of its proper divisors (37570433883990).

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

21113010135210 is a wasteful number, since it uses less digits than its factorization.

21113010135210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965.

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 21113010135210 its reverse (1253101031112), we get a palindrome (22366111166322).

The spelling of 21113010135210 in words is "twenty-one trillion, one hundred thirteen billion, ten million, one hundred thirty-five thousand, two hundred ten".