22101001997 has 8 divisors (see below), whose sum is σ = 23409465912. Its totient is φ = 20793472000.

The previous prime is 22101001991. The next prime is 22101002003. The reversal of 22101001997 is 79910010122.

It is an interprime number because it is at equal distance from previous prime (22101001991) and next prime (22101002003).

It can be written as a sum of positive squares in 4 ways, for example, as 1096007236 + 21004994761 = 33106^2 + 144931^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22101001997 - 2²⁸ = 21832566541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101001991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184454 + ... + 279687.

It is an arithmetic number, because the mean of its divisors is an integer number (2926183239).

Almost surely, 2^22101001997 is an apocalyptic number.

It is an amenable number.

22101001997 is a deficient number, since it is larger than the sum of its proper divisors (1308463915).

22101001997 is a wasteful number, since it uses less digits than its factorization.

22101001997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466959.

The product of its (nonzero) digits is 2268, while the sum is 32.

The spelling of 22101001997 in words is "twenty-two billion, one hundred one million, one thousand, nine hundred ninety-seven".