221021200200101 has 4 divisors (see below), whose sum is σ = 252595657371552. Its totient is φ = 189446743028652.

The previous prime is 221021200200041. The next prime is 221021200200103. The reversal of 221021200200101 is 101002002120122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221021200200101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021200200103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15787228585715 + ... + 15787228585728.

It is an arithmetic number, because the mean of its divisors is an integer number (63148914342888).

Almost surely, 2^{221021200200101} is an apocalyptic number.

It is an amenable number.

221021200200101 is a deficient number, since it is larger than the sum of its proper divisors (31574457171451).

221021200200101 is an equidigital number, since it uses as much as digits as its factorization.

221021200200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31574457171450.

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

Adding to 221021200200101 its reverse (101002002120122), we get a palindrome (322023202320223).

The spelling of 221021200200101 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred million, two hundred thousand, one hundred one".