1002122020221 has 32 divisors (see below), whose sum is σ = 1548706480128. Its totient is φ = 564519002880.

The previous prime is 1002122020201. The next prime is 1002122020241. The reversal of 1002122020221 is 1220202212001.

It is an interprime number because it is at equal distance from previous prime (1002122020201) and next prime (1002122020241).

It is not a de Polignac number, because 1002122020221 - 2¹⁴ = 1002122003837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002122020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002122020201) 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 31 ways as a sum of consecutive naturals, for example, 18032740 + ... + 18088226.

It is an arithmetic number, because the mean of its divisors is an integer number (48397077504).

Almost surely, 2^{1002122020221} is an apocalyptic number.

It is an amenable number.

1002122020221 is a deficient number, since it is larger than the sum of its proper divisors (546584459907).

1002122020221 is a wasteful number, since it uses less digits than its factorization.

1002122020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67681.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1002122020221 its reverse (1220202212001), we get a palindrome (2222324232222).

The spelling of 1002122020221 in words is "one trillion, two billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".