221311121231003 has 4 divisors (see below), whose sum is σ = 221311226606160. Its totient is φ = 221311015855848.

The previous prime is 221311121230993. The next prime is 221311121231047. The reversal of 221311121231003 is 300132121113122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221311121231003 - 2²² = 221311117036699 is a prime.

It is a super-2 number, since 2×221311121231003² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221311121231003.

It is not an unprimeable number, because it can be changed into a prime (221311121231093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49471823 + ... + 53759496.

It is an arithmetic number, because the mean of its divisors is an integer number (55327806651540).

Almost surely, 2^{221311121231003} is an apocalyptic number.

221311121231003 is a deficient number, since it is larger than the sum of its proper divisors (105375157).

221311121231003 is a wasteful number, since it uses less digits than its factorization.

221311121231003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105375156.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 221311121231003 its reverse (300132121113122), we get a palindrome (521443242344125).

The spelling of 221311121231003 in words is "two hundred twenty-one trillion, three hundred eleven billion, one hundred twenty-one million, two hundred thirty-one thousand, three".