2221022202021 has 24 divisors (see below), whose sum is σ = 3668460756480. Its totient is φ = 1268459287776.

The previous prime is 2221022201969. The next prime is 2221022202043. The reversal of 2221022202021 is 1202022201222.

It is not a de Polignac number, because 2221022202021 - 2¹¹ = 2221022199973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221022201985 and 2221022202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221012202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9554466 + ... + 9784163.

It is an arithmetic number, because the mean of its divisors is an integer number (152852531520).

Almost surely, 2^{2221022202021} is an apocalyptic number.

2221022202021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2221022202021 is a deficient number, since it is larger than the sum of its proper divisors (1447438554459).

2221022202021 is a wasteful number, since it uses less digits than its factorization.

2221022202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19340465 (or 19340462 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2221022202021 its reverse (1202022201222), we get a palindrome (3423044403243).

The spelling of 2221022202021 in words is "two trillion, two hundred twenty-one billion, twenty-two million, two hundred two thousand, twenty-one".