21101130244144 has 20 divisors (see below), whose sum is σ = 40885064985240. Its totient is φ = 10550145731840.

The previous prime is 21101130244121. The next prime is 21101130244147. The reversal of 21101130244144 is 44144203110112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21101130244147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25796602 + ... + 26602009.

It is an arithmetic number, because the mean of its divisors is an integer number (2044253249262).

Almost surely, 2^{21101130244144} is an apocalyptic number.

It is an amenable number.

21101130244144 is a deficient number, since it is larger than the sum of its proper divisors (19783934741096).

21101130244144 is a wasteful number, since it uses less digits than its factorization.

21101130244144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52423788 (or 52423782 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21101130244144 its reverse (44144203110112), we get a palindrome (65245333354256).

The spelling of 21101130244144 in words is "twenty-one trillion, one hundred one billion, one hundred thirty million, two hundred forty-four thousand, one hundred forty-four".