21013010034042 has 128 divisors (see below), whose sum is σ = 46939108608000. Its totient is φ = 6226651791360.

The previous prime is 21013010033989. The next prime is 21013010034103. The reversal of 21013010034042 is 24043001031012.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2226185559 + ... + 2226194997.

It is an arithmetic number, because the mean of its divisors is an integer number (366711786000).

Almost surely, 2^{21013010034042} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21013010034042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23469554304000).

21013010034042 is an abundant number, since it is smaller than the sum of its proper divisors (25926098573958).

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

21013010034042 is a wasteful number, since it uses less digits than its factorization.

21013010034042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11896.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21013010034042 its reverse (24043001031012), we get a palindrome (45056011065054).

The spelling of 21013010034042 in words is "twenty-one trillion, thirteen billion, ten million, thirty-four thousand, forty-two".