221002211011021 has 16 divisors (see below), whose sum is σ = 241485493314240. Its totient is φ = 200584297969920.

The previous prime is 221002211011013. The next prime is 221002211011123. The reversal of 221002211011021 is 120110112200122.

It is a cyclic number.

It is not a de Polignac number, because 221002211011021 - 2³ = 221002211011013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002211010986 and 221002211011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002211012021) 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 15 ways as a sum of consecutive naturals, for example, 1169644071 + ... + 1169833003.

It is an arithmetic number, because the mean of its divisors is an integer number (15092843332140).

Almost surely, 2^{221002211011021} is an apocalyptic number.

It is an amenable number.

221002211011021 is a deficient number, since it is larger than the sum of its proper divisors (20483282303219).

221002211011021 is a wasteful number, since it uses less digits than its factorization.

221002211011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361356.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221002211011021 its reverse (120110112200122), we get a palindrome (341112323211143).

The spelling of 221002211011021 in words is "two hundred twenty-one trillion, two billion, two hundred eleven million, eleven thousand, twenty-one".