21100221020001 has 8 divisors (see below), whose sum is σ = 28134514894464. Its totient is φ = 14066370579440.

The previous prime is 21100221019987. The next prime is 21100221020009. The reversal of 21100221020001 is 10002012200112.

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 21100221020001 - 2⁷ = 21100221019873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100221020009) 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, 110747430 + ... + 110937791.

It is an arithmetic number, because the mean of its divisors is an integer number (3516814361808).

Almost surely, 2^{21100221020001} is an apocalyptic number.

It is an amenable number.

21100221020001 is a deficient number, since it is larger than the sum of its proper divisors (7034293874463).

21100221020001 is a wasteful number, since it uses less digits than its factorization.

21100221020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221716951.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100221020001 its reverse (10002012200112), we get a palindrome (31102233220113).

The spelling of 21100221020001 in words is "twenty-one trillion, one hundred billion, two hundred twenty-one million, twenty thousand, one".