221021322002142 has 16 divisors (see below), whose sum is σ = 442140462744960. Its totient is φ = 73657470877272.

The previous prime is 221021322002141. The next prime is 221021322002149. The reversal of 221021322002142 is 241200223120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021322002141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4075751488 + ... + 4075805715.

It is an arithmetic number, because the mean of its divisors is an integer number (27633778921560).

Almost surely, 2^{221021322002142} is an apocalyptic number.

221021322002142 is an abundant number, since it is smaller than the sum of its proper divisors (221119140742818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221021322002142 is a wasteful number, since it uses less digits than its factorization.

221021322002142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8151561727.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221021322002142 its reverse (241200223120122), we get a palindrome (462221545122264).

The spelling of 221021322002142 in words is "two hundred twenty-one trillion, twenty-one billion, three hundred twenty-two million, two thousand, one hundred forty-two".