21112101002001 has 8 divisors (see below), whose sum is σ = 28149491240640. Its totient is φ = 14074722382352.

The previous prime is 21112101001973. The next prime is 21112101002009. The reversal of 21112101002001 is 10020010121112.

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 21112101002001 - 2¹⁷ = 21112100870929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112101002009) 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, 3120340 + ... + 7208378.

It is an arithmetic number, because the mean of its divisors is an integer number (3518686405080).

Almost surely, 2^{21112101002001} is an apocalyptic number.

It is an amenable number.

21112101002001 is a deficient number, since it is larger than the sum of its proper divisors (7037390238639).

21112101002001 is a wasteful number, since it uses less digits than its factorization.

21112101002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5809495.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21112101002001 its reverse (10020010121112), we get a palindrome (31132111123113).

The spelling of 21112101002001 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, two thousand, one".