221100202001 has 8 divisors (see below), whose sum is σ = 252688788864. Its totient is φ = 189512326080.

The previous prime is 221100201997. The next prime is 221100202007. The reversal of 221100202001 is 100202001122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221100202001 - 2² = 221100201997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100202007) 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, 1142441 + ... + 1321881.

It is an arithmetic number, because the mean of its divisors is an integer number (31586098608).

Almost surely, 2^221100202001 is an apocalyptic number.

It is an amenable number.

221100202001 is a deficient number, since it is larger than the sum of its proper divisors (31588586863).

221100202001 is a wasteful number, since it uses less digits than its factorization.

221100202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355471.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221100202001 its reverse (100202001122), we get a palindrome (321302203123).

The spelling of 221100202001 in words is "two hundred twenty-one billion, one hundred million, two hundred two thousand, one".