221342222243121 has 16 divisors (see below), whose sum is σ = 338238863301504. Its totient is φ = 126122965968384.

The previous prime is 221342222243113. The next prime is 221342222243137. The reversal of 221342222243121 is 121342222243122.

It is not a de Polignac number, because 221342222243121 - 2³ = 221342222243113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221342222245121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14929320946 + ... + 14929335771.

It is an arithmetic number, because the mean of its divisors is an integer number (21139928956344).

Almost surely, 2^{221342222243121} is an apocalyptic number.

221342222243121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221342222243121 is a deficient number, since it is larger than the sum of its proper divisors (116896641058383).

221342222243121 is a wasteful number, since it uses less digits than its factorization.

221342222243121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29858657080.

The product of its digits is 36864, while the sum is 33.

Adding to 221342222243121 its reverse (121342222243122), we get a palindrome (342684444486243).

Subtracting from 221342222243121 its reverse (121342222243122), we obtain a palindrome (99999999999999).

The spelling of 221342222243121 in words is "two hundred twenty-one trillion, three hundred forty-two billion, two hundred twenty-two million, two hundred forty-three thousand, one hundred twenty-one".