21988900601 has 8 divisors (see below), whose sum is σ = 22446650880. Its totient is φ = 21532738032.

The previous prime is 21988900573. The next prime is 21988900627. The reversal of 21988900601 is 10600988912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21988900601 is a prime.

It is a super-2 number, since 2×21988900601² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21988900651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368921 + ... + 424358.

It is an arithmetic number, because the mean of its divisors is an integer number (2805831360).

Almost surely, 2^21988900601 is an apocalyptic number.

It is an amenable number.

21988900601 is a deficient number, since it is larger than the sum of its proper divisors (457750279).

21988900601 is an equidigital number, since it uses as much as digits as its factorization.

21988900601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793855.

The product of its (nonzero) digits is 62208, while the sum is 44.

The spelling of 21988900601 in words is "twenty-one billion, nine hundred eighty-eight million, nine hundred thousand, six hundred one".