21611125136344 has 8 divisors (see below), whose sum is σ = 40520859630660. Its totient is φ = 10805562568168.

The previous prime is 21611125136333. The next prime is 21611125136353. The reversal of 21611125136344 is 44363152111612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21611125136297 and 21611125136306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1350695321014 + ... + 1350695321029.

Almost surely, 2^{21611125136344} is an apocalyptic number.

It is an amenable number.

21611125136344 is a deficient number, since it is larger than the sum of its proper divisors (18909734494316).

21611125136344 is a wasteful number, since it uses less digits than its factorization.

21611125136344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701390642049 (or 2701390642045 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

Adding to 21611125136344 its reverse (44363152111612), we get a palindrome (65974277247956).

The spelling of 21611125136344 in words is "twenty-one trillion, six hundred eleven billion, one hundred twenty-five million, one hundred thirty-six thousand, three hundred forty-four".