21112020100001 has 8 divisors (see below), whose sum is σ = 21165385919040. Its totient is φ = 21058678257552.

The previous prime is 21112020099991. The next prime is 21112020100057. The reversal of 21112020100001 is 10000102021112.

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 21112020100001 - 2³⁴ = 21094840230817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112020108001) 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, 4230215 + ... + 7753628.

It is an arithmetic number, because the mean of its divisors is an integer number (2645673239880).

Almost surely, 2^{21112020100001} is an apocalyptic number.

It is an amenable number.

21112020100001 is a deficient number, since it is larger than the sum of its proper divisors (53365819039).

21112020100001 is a wasteful number, since it uses less digits than its factorization.

21112020100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11988295.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21112020100001 its reverse (10000102021112), we get a palindrome (31112122121113).

The spelling of 21112020100001 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred thousand, one".