221120554731 has 8 divisors (see below), whose sum is σ = 294870606480. Its totient is φ = 147392103072.

The previous prime is 221120554717. The next prime is 221120554741. The reversal of 221120554731 is 137455021122.

It is a happy number.

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

It is not a de Polignac number, because 221120554731 - 2⁹ = 221120554219 is a prime.

It is a super-2 number, since 2×221120554731² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221120554692 and 221120554701.

It is not an unprimeable number, because it can be changed into a prime (221120554741) 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, 5376120 + ... + 5417093.

It is an arithmetic number, because the mean of its divisors is an integer number (36858825810).

Almost surely, 2^221120554731 is an apocalyptic number.

221120554731 is a deficient number, since it is larger than the sum of its proper divisors (73750051749).

221120554731 is a wasteful number, since it uses less digits than its factorization.

221120554731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800045.

The product of its (nonzero) digits is 16800, while the sum is 33.

Adding to 221120554731 its reverse (137455021122), we get a palindrome (358575575853).

The spelling of 221120554731 in words is "two hundred twenty-one billion, one hundred twenty million, five hundred fifty-four thousand, seven hundred thirty-one".