21611241737242 has 16 divisors (see below), whose sum is σ = 32592372048000. Its totient is φ = 10747186511040.

The previous prime is 21611241737237. The next prime is 21611241737297. The reversal of 21611241737242 is 24273714211612.

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, 16568242 + ... + 17824957.

It is an arithmetic number, because the mean of its divisors is an integer number (2037023253000).

Almost surely, 2^{21611241737242} is an apocalyptic number.

21611241737242 is a deficient number, since it is larger than the sum of its proper divisors (10981130310758).

21611241737242 is a wasteful number, since it uses less digits than its factorization.

21611241737242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34394901.

The product of its digits is 225792, while the sum is 43.

Adding to 21611241737242 its reverse (24273714211612), we get a palindrome (45884955948854).

The spelling of 21611241737242 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-one million, seven hundred thirty-seven thousand, two hundred forty-two".