221123113451 has 8 divisors (see below), whose sum is σ = 224847868224. Its totient is φ = 217423611720.

The previous prime is 221123113447. The next prime is 221123113469. The reversal of 221123113451 is 154311321122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221123113451 - 2² = 221123113447 is a prime.

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 221123113451.

It is not an unprimeable number, because it can be changed into a prime (221123113051) 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, 6295601 + ... + 6330626.

It is an arithmetic number, because the mean of its divisors is an integer number (28105983528).

Almost surely, 2^221123113451 is an apocalyptic number.

221123113451 is a deficient number, since it is larger than the sum of its proper divisors (3724754773).

221123113451 is a wasteful number, since it uses less digits than its factorization.

221123113451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12626521.

The product of its digits is 1440, while the sum is 26.

Adding to 221123113451 its reverse (154311321122), we get a palindrome (375434434573).

The spelling of 221123113451 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred thirteen thousand, four hundred fifty-one".