21121113310044 has 24 divisors (see below), whose sum is σ = 53762833880448. Its totient is φ = 6400337366640.

The previous prime is 21121113309977. The next prime is 21121113310159. The reversal of 21121113310044 is 44001331112112.

It is a super-2 number, since 2×21121113310044² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121113309996 and 21121113310023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80004216952 + ... + 80004217215.

It is an arithmetic number, because the mean of its divisors is an integer number (2240118078352).

Almost surely, 2^{21121113310044} is an apocalyptic number.

It is an amenable number.

21121113310044 is an abundant number, since it is smaller than the sum of its proper divisors (32641720570404).

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

21121113310044 is a wasteful number, since it uses less digits than its factorization.

21121113310044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160008434185 (or 160008434183 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 21121113310044 its reverse (44001331112112), we get a palindrome (65122444422156).

The spelling of 21121113310044 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred thirteen million, three hundred ten thousand, forty-four".