21116006430501 has 8 divisors (see below), whose sum is σ = 28158721061760. Its totient is φ = 14075314709792.

The previous prime is 21116006430473. The next prime is 21116006430577. The reversal of 21116006430501 is 10503460061112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21116006430501 - 2⁵ = 21116006430469 is a prime.

It is a super-2 number, since 2×21116006430501² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116006430581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505703280 + ... + 505745033.

It is an arithmetic number, because the mean of its divisors is an integer number (3519840132720).

Almost surely, 2^{21116006430501} is an apocalyptic number.

It is an amenable number.

21116006430501 is a deficient number, since it is larger than the sum of its proper divisors (7042714631259).

21116006430501 is a wasteful number, since it uses less digits than its factorization.

21116006430501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011455275.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 21116006430501 its reverse (10503460061112), we get a palindrome (31619466491613).

The spelling of 21116006430501 in words is "twenty-one trillion, one hundred sixteen billion, six million, four hundred thirty thousand, five hundred one".