221231103420403 has 4 divisors (see below), whose sum is σ = 221401150388208. Its totient is φ = 221061056452600.

The previous prime is 221231103420323. The next prime is 221231103420421. The reversal of 221231103420403 is 304024301132122.

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 221231103420403 - 2¹³ = 221231103412211 is a prime.

It is a super-2 number, since 2×221231103420403² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221231103420443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85023481951 + ... + 85023484552.

It is an arithmetic number, because the mean of its divisors is an integer number (55350287597052).

Almost surely, 2^{221231103420403} is an apocalyptic number.

221231103420403 is a deficient number, since it is larger than the sum of its proper divisors (170046967805).

221231103420403 is a wasteful number, since it uses less digits than its factorization.

221231103420403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170046967804.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 221231103420403 its reverse (304024301132122), we get a palindrome (525255404552525).

The spelling of 221231103420403 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, one hundred three million, four hundred twenty thousand, four hundred three".