221002211212021 has 16 divisors (see below), whose sum is σ = 232198478928000. Its totient is φ = 209943191220928.

The previous prime is 221002211212019. The next prime is 221002211212043. The reversal of 221002211212021 is 120212112200122.

It is a cyclic number.

It is not a de Polignac number, because 221002211212021 - 2¹ = 221002211212019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221002211212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002211212121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54380071 + ... + 58302628.

It is an arithmetic number, because the mean of its divisors is an integer number (14512404933000).

Almost surely, 2^{221002211212021} is an apocalyptic number.

It is an amenable number.

221002211212021 is a deficient number, since it is larger than the sum of its proper divisors (11196267715979).

221002211212021 is a wasteful number, since it uses less digits than its factorization.

221002211212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112683308.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221002211212021 its reverse (120212112200122), we get a palindrome (341214323412143).

The spelling of 221002211212021 in words is "two hundred twenty-one trillion, two billion, two hundred eleven million, two hundred twelve thousand, twenty-one".