21611131604014 has 4 divisors (see below), whose sum is σ = 32416697406024. Its totient is φ = 10805565802006.

The previous prime is 21611131604003. The next prime is 21611131604033. The reversal of 21611131604014 is 41040613111612.

It is a semiprime because it is the product of two primes.

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, 5402782901002 + ... + 5402782901005.

It is an arithmetic number, because the mean of its divisors is an integer number (8104174351506).

Almost surely, 2^{21611131604014} is an apocalyptic number.

21611131604014 is a deficient number, since it is larger than the sum of its proper divisors (10805565802010).

21611131604014 is a wasteful number, since it uses less digits than its factorization.

21611131604014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805565802009.

The product of its (nonzero) digits is 3456, while the sum is 31.

Adding to 21611131604014 its reverse (41040613111612), we get a palindrome (62651744715626).

The spelling of 21611131604014 in words is "twenty-one trillion, six hundred eleven billion, one hundred thirty-one million, six hundred four thousand, fourteen".