221200110021 has 8 divisors (see below), whose sum is σ = 321745614624. Its totient is φ = 134060672720.

The previous prime is 221200109983. The next prime is 221200110031. The reversal of 221200110021 is 120011002122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200110021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221200109979 and 221200110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200110031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3351516786 + ... + 3351516851.

It is an arithmetic number, because the mean of its divisors is an integer number (40218201828).

Almost surely, 2^221200110021 is an apocalyptic number.

It is an amenable number.

221200110021 is a deficient number, since it is larger than the sum of its proper divisors (100545504603).

221200110021 is a wasteful number, since it uses less digits than its factorization.

221200110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703033651.

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

Adding to 221200110021 its reverse (120011002122), we get a palindrome (341211112143).

It can be divided in two parts, 22 and 1200110021, that multiplied together give a palindrome (26402420462).

The spelling of 221200110021 in words is "two hundred twenty-one billion, two hundred million, one hundred ten thousand, twenty-one".