21997067551201 has 8 divisors (see below), whose sum is σ = 22004306495360. Its totient is φ = 21989829615408.

The previous prime is 21997067551183. The next prime is 21997067551213. The reversal of 21997067551201 is 10215576079912.

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-21997067551201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21997067551231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44694280 + ... + 45183766.

It is an arithmetic number, because the mean of its divisors is an integer number (2750538311920).

Almost surely, 2^{21997067551201} is an apocalyptic number.

It is an amenable number.

21997067551201 is a deficient number, since it is larger than the sum of its proper divisors (7238944159).

21997067551201 is a wasteful number, since it uses less digits than its factorization.

21997067551201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504183.

The product of its (nonzero) digits is 2381400, while the sum is 55.

The spelling of 21997067551201 in words is "twenty-one trillion, nine hundred ninety-seven billion, sixty-seven million, five hundred fifty-one thousand, two hundred one".