21288710601 has 16 divisors (see below), whose sum is σ = 32626377600. Its totient is φ = 13703077584.

The previous prime is 21288710561. The next prime is 21288710621. The reversal of 21288710601 is 10601788212.

21288710601 is a `hidden beast` number, since 21 + 28 + 8 + 7 + 1 + 0 + 601 = 666.

It is not a de Polignac number, because 21288710601 - 2¹⁹ = 21288186313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21288710621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13593541 + ... + 13595106.

It is an arithmetic number, because the mean of its divisors is an integer number (2039148600).

Almost surely, 2^21288710601 is an apocalyptic number.

It is an amenable number.

21288710601 is a deficient number, since it is larger than the sum of its proper divisors (11337666999).

21288710601 is a wasteful number, since it uses less digits than its factorization.

21288710601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27188685 (or 27188679 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 21288710601 in words is "twenty-one billion, two hundred eighty-eight million, seven hundred ten thousand, six hundred one".