21100021002201 has 32 divisors (see below), whose sum is σ = 29717426333952. Its totient is φ = 13290497454080.

The previous prime is 21100021002197. The next prime is 21100021002253. The reversal of 21100021002201 is 10220012000112.

It is a cyclic number.

It is not a de Polignac number, because 21100021002201 - 2² = 21100021002197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100021002271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2333520 + ... + 6902561.

It is an arithmetic number, because the mean of its divisors is an integer number (928669572936).

Almost surely, 2^{21100021002201} is an apocalyptic number.

It is an amenable number.

21100021002201 is a deficient number, since it is larger than the sum of its proper divisors (8617405331751).

21100021002201 is a wasteful number, since it uses less digits than its factorization.

21100021002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236513.

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

Adding to 21100021002201 its reverse (10220012000112), we get a palindrome (31320033002313).

The spelling of 21100021002201 in words is "twenty-one trillion, one hundred billion, twenty-one million, two thousand, two hundred one".