221021000120011 has 8 divisors (see below), whose sum is σ = 272025846301664. Its totient is φ = 174873758336640.

The previous prime is 221021000119981. The next prime is 221021000120087. The reversal of 221021000120011 is 110021000120122.

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

It is a cyclic number.

It is not a de Polignac number, because 221021000120011 - 2¹⁵ = 221021000087243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 221021000119973 and 221021000120000.

It is not an unprimeable number, because it can be changed into a prime (221021000120611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214401099470 + ... + 1214401099651.

It is an arithmetic number, because the mean of its divisors is an integer number (34003230787708).

Almost surely, 2^{221021000120011} is an apocalyptic number.

221021000120011 is a deficient number, since it is larger than the sum of its proper divisors (51004846181653).

221021000120011 is a wasteful number, since it uses less digits than its factorization.

221021000120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428802199141.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221021000120011 its reverse (110021000120122), we get a palindrome (331042000240133).

The spelling of 221021000120011 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty thousand, eleven".