21112021122001 has 8 divisors (see below), whose sum is σ = 21236676026720. Its totient is φ = 20987729114688.

The previous prime is 21112021121981. The next prime is 21112021122011. The reversal of 21112021122001 is 10022112021112.

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 21112021122001 - 2⁵ = 21112021121969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112021122011) 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, 90607656 + ... + 90840361.

It is an arithmetic number, because the mean of its divisors is an integer number (2654584503340).

Almost surely, 2^{21112021122001} is an apocalyptic number.

It is an amenable number.

21112021122001 is a deficient number, since it is larger than the sum of its proper divisors (124654904719).

21112021122001 is a wasteful number, since it uses less digits than its factorization.

21112021122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181448703.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112021122001 its reverse (10022112021112), we get a palindrome (31134133143113).

The spelling of 21112021122001 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred twenty-two thousand, one".