221125343321554 has 32 divisors (see below), whose sum is σ = 401373007678080. Its totient is φ = 89192829881088.

The previous prime is 221125343321521. The next prime is 221125343321599. The reversal of 221125343321554 is 455123343521122.

It is a self number, because there is not a number n which added to its sum of digits gives 221125343321554.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34208989 + ... + 40156015.

It is an arithmetic number, because the mean of its divisors is an integer number (12542906489940).

Almost surely, 2^{221125343321554} is an apocalyptic number.

221125343321554 is a deficient number, since it is larger than the sum of its proper divisors (180247664356526).

221125343321554 is a wasteful number, since it uses less digits than its factorization.

221125343321554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103282.

The product of its digits is 864000, while the sum is 43.

Adding to 221125343321554 its reverse (455123343521122), we get a palindrome (676248686842676).

The spelling of 221125343321554 in words is "two hundred twenty-one trillion, one hundred twenty-five billion, three hundred forty-three million, three hundred twenty-one thousand, five hundred fifty-four".