10011001221997 has 8 divisors (see below), whose sum is σ = 10016480650176. Its totient is φ = 10005522241632.

The previous prime is 10011001221973. The next prime is 10011001222007. The reversal of 10011001221997 is 79912210011001.

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-10011001221997 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 (10011001221937) 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, 50914128 + ... + 51110374.

It is an arithmetic number, because the mean of its divisors is an integer number (1252060081272).

Almost surely, 2^{10011001221997} is an apocalyptic number.

It is an amenable number.

10011001221997 is a deficient number, since it is larger than the sum of its proper divisors (5479428179).

10011001221997 is a wasteful number, since it uses less digits than its factorization.

10011001221997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223907.

The product of its (nonzero) digits is 2268, while the sum is 34.

Adding to 10011001221997 its reverse (79912210011001), we get a palindrome (89923211232998).

The spelling of 10011001221997 in words is "ten trillion, eleven billion, one million, two hundred twenty-one thousand, nine hundred ninety-seven".