21100202222001 has 32 divisors (see below), whose sum is σ = 33262388044800. Its totient is φ = 11641145947200.

The previous prime is 21100202221997. The next prime is 21100202222003. The reversal of 21100202222001 is 10022220200112.

It is not a de Polignac number, because 21100202222001 - 2² = 21100202221997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100202222003) 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, 20782026 + ... + 21773676.

It is an arithmetic number, because the mean of its divisors is an integer number (1039449626400).

Almost surely, 2^{21100202222001} is an apocalyptic number.

21100202222001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21100202222001 is a deficient number, since it is larger than the sum of its proper divisors (12162185822799).

21100202222001 is a wasteful number, since it uses less digits than its factorization.

21100202222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026629.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21100202222001 its reverse (10022220200112), we get a palindrome (31122422422113).

The spelling of 21100202222001 in words is "twenty-one trillion, one hundred billion, two hundred two million, two hundred twenty-two thousand, one".