221002212012021 has 96 divisors (see below), whose sum is σ = 375166449515520. Its totient is φ = 124042876876800.

The previous prime is 221002212011989. The next prime is 221002212012047. The reversal of 221002212012021 is 120210212200122.

It is a happy number.

221002212012021 is a `hidden beast` number, since 221 + 0 + 0 + 221 + 20 + 1 + 202 + 1 = 666.

221002212012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221002212012021 - 2⁵ = 221002212011989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221002212011985 and 221002212012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002212012721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 930246 + ... + 21044471.

It is an arithmetic number, because the mean of its divisors is an integer number (3907983849120).

Almost surely, 2^{221002212012021} is an apocalyptic number.

It is an amenable number.

221002212012021 is a deficient number, since it is larger than the sum of its proper divisors (154164237503499).

221002212012021 is a wasteful number, since it uses less digits than its factorization.

221002212012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21974907 (or 21974904 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221002212012021 its reverse (120210212200122), we get a palindrome (341212424212143).

The spelling of 221002212012021 in words is "two hundred twenty-one trillion, two billion, two hundred twelve million, twelve thousand, twenty-one".