21611122146542 has 8 divisors (see below), whose sum is σ = 32493682468632. Its totient is φ = 10779894657000.

The previous prime is 21611122146521. The next prime is 21611122146571. The reversal of 21611122146542 is 24564122111612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21611122146496 and 21611122146505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12833207084 + ... + 12833208767.

It is an arithmetic number, because the mean of its divisors is an integer number (4061710308579).

Almost surely, 2^{21611122146542} is an apocalyptic number.

21611122146542 is a deficient number, since it is larger than the sum of its proper divisors (10882560322090).

21611122146542 is a wasteful number, since it uses less digits than its factorization.

21611122146542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25666416274.

The product of its digits is 46080, while the sum is 38.

The spelling of 21611122146542 in words is "twenty-one trillion, six hundred eleven billion, one hundred twenty-two million, one hundred forty-six thousand, five hundred forty-two".