21144113221110 has 64 divisors (see below), whose sum is σ = 55428592875264. Its totient is φ = 5119414140800.

The previous prime is 21144113221081. The next prime is 21144113221117. The reversal of 21144113221110 is 1112231144112.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144113221117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39933396 + ... + 40459415.

It is an arithmetic number, because the mean of its divisors is an integer number (866071763676).

Almost surely, 2^{21144113221110} is an apocalyptic number.

21144113221110 is an abundant number, since it is smaller than the sum of its proper divisors (34284479654154).

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

21144113221110 is a wasteful number, since it uses less digits than its factorization.

21144113221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80393629.

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 21144113221110 its reverse (1112231144112), we get a palindrome (22256344365222).

The spelling of 21144113221110 in words is "twenty-one trillion, one hundred forty-four billion, one hundred thirteen million, two hundred twenty-one thousand, one hundred ten".