21010020221010 has 64 divisors (see below), whose sum is σ = 51504322604544. Its totient is φ = 5482675968000.

The previous prime is 21010020221009. The next prime is 21010020221023. The reversal of 21010020221010 is 1012202001012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8744710 + ... + 10885310.

It is an arithmetic number, because the mean of its divisors is an integer number (804755040696).

Almost surely, 2^{21010020221010} is an apocalyptic number.

21010020221010 is an abundant number, since it is smaller than the sum of its proper divisors (30494302383534).

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

21010020221010 is a wasteful number, since it uses less digits than its factorization.

21010020221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147619.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21010020221010 its reverse (1012202001012), we get a palindrome (22022222222022).

The spelling of 21010020221010 in words is "twenty-one trillion, ten billion, twenty million, two hundred twenty-one thousand, ten".