21100220212001 has 8 divisors (see below), whose sum is σ = 24114664120320. Its totient is φ = 18085807987488.

The previous prime is 21100220211911. The next prime is 21100220212111. The reversal of 21100220212001 is 10021202200112.

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 21100220212001 - 2³⁴ = 21083040342817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100220217001) 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, 6476321 + ... + 9172958.

It is an arithmetic number, because the mean of its divisors is an integer number (3014333015040).

Almost surely, 2^{21100220212001} is an apocalyptic number.

It is an amenable number.

21100220212001 is a deficient number, since it is larger than the sum of its proper divisors (3014443908319).

21100220212001 is a wasteful number, since it uses less digits than its factorization.

21100220212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15841903.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21100220212001 its reverse (10021202200112), we get a palindrome (31121422412113).

The spelling of 21100220212001 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, two hundred twelve thousand, one".