21116144027 has 12 divisors (see below), whose sum is σ = 23277241848. Its totient is φ = 19141135200.

The previous prime is 21116144011. The next prime is 21116144029. The reversal of 21116144027 is 72044161112.

It is a happy number.

It is not a de Polignac number, because 21116144027 - 2⁴ = 21116144011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21116144029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209474 + ... + 293447.

It is an arithmetic number, because the mean of its divisors is an integer number (1939770154).

Almost surely, 2^21116144027 is an apocalyptic number.

21116144027 is a deficient number, since it is larger than the sum of its proper divisors (2161097821).

21116144027 is a wasteful number, since it uses less digits than its factorization.

21116144027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503290 (or 503279 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The spelling of 21116144027 in words is "twenty-one billion, one hundred sixteen million, one hundred forty-four thousand, twenty-seven".