21201110111010 has 32 divisors (see below), whose sum is σ = 52123704861312. Its totient is φ = 5515735963520.

The previous prime is 21201110110993. The next prime is 21201110111011. The reversal of 21201110111010 is 1011101110212.

It is not an unprimeable number, because it can be changed into a prime (21201110111011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8618336214 + ... + 8618338673.

It is an arithmetic number, because the mean of its divisors is an integer number (1628865776916).

Almost surely, 2^{21201110111010} is an apocalyptic number.

21201110111010 is an abundant number, since it is smaller than the sum of its proper divisors (30922594750302).

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

21201110111010 is a wasteful number, since it uses less digits than its factorization.

21201110111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17236674938.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21201110111010 its reverse (1011101110212), we get a palindrome (22212211221222).

The spelling of 21201110111010 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred eleven thousand, ten".