21985701201 has 12 divisors (see below), whose sum is σ = 32053920912. Its totient is φ = 14520150936.

The previous prime is 21985701187. The next prime is 21985701247. The reversal of 21985701201 is 10210758912.

It is a happy number.

It is not a de Polignac number, because 21985701201 - 2⁵ = 21985701169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21985701251) 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, 11414251 + ... + 11416176.

It is an arithmetic number, because the mean of its divisors is an integer number (2671160076).

Almost surely, 2^21985701201 is an apocalyptic number.

It is an amenable number.

21985701201 is a deficient number, since it is larger than the sum of its proper divisors (10068219711).

21985701201 is a wasteful number, since it uses less digits than its factorization.

21985701201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22830540 (or 22830537 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 21985701201 in words is "twenty-one billion, nine hundred eighty-five million, seven hundred one thousand, two hundred one".