221210112312442 has 16 divisors (see below), whose sum is σ = 364409580996000. Its totient is φ = 99875218492240.

The previous prime is 221210112312421. The next prime is 221210112312487. The reversal of 221210112312442 is 244213211012122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221210112312442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33741624592 + ... + 33741631147.

It is an arithmetic number, because the mean of its divisors is an integer number (22775598812250).

Almost surely, 2^{221210112312442} is an apocalyptic number.

221210112312442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221210112312442 is a deficient number, since it is larger than the sum of its proper divisors (143199468683558).

221210112312442 is a wasteful number, since it uses less digits than its factorization.

221210112312442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67483255901.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 221210112312442 its reverse (244213211012122), we get a palindrome (465423323324564).

The spelling of 221210112312442 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, three hundred twelve thousand, four hundred forty-two".