21385614201 has 32 divisors (see below), whose sum is σ = 33732034560. Its totient is φ = 11796394176.

The previous prime is 21385614161. The next prime is 21385614203. The reversal of 21385614201 is 10241658312.

It is not a de Polignac number, because 21385614201 - 2¹⁰ = 21385613177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21385614203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9681 + ... + 207038.

It is an arithmetic number, because the mean of its divisors is an integer number (1054126080).

Almost surely, 2^21385614201 is an apocalyptic number.

21385614201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21385614201 is a deficient number, since it is larger than the sum of its proper divisors (12346420359).

21385614201 is a wasteful number, since it uses less digits than its factorization.

21385614201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216893.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 21385614201 in words is "twenty-one billion, three hundred eighty-five million, six hundred fourteen thousand, two hundred one".