221440031321142 has 16 divisors (see below), whose sum is σ = 446260826480832. Its totient is φ = 73249883133960.

The previous prime is 221440031321129. The next prime is 221440031321147. The reversal of 221440031321142 is 241123130044122.

It is a happy number.

221440031321142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221440031321147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140865159088 + ... + 140865160659.

It is an arithmetic number, because the mean of its divisors is an integer number (27891301655052).

Almost surely, 2^{221440031321142} is an apocalyptic number.

221440031321142 is an abundant number, since it is smaller than the sum of its proper divisors (224820795159690).

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

221440031321142 is a wasteful number, since it uses less digits than its factorization.

221440031321142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281730319883.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 221440031321142 its reverse (241123130044122), we get a palindrome (462563161365264).

The spelling of 221440031321142 in words is "two hundred twenty-one trillion, four hundred forty billion, thirty-one million, three hundred twenty-one thousand, one hundred forty-two".