221131541125 has 16 divisors (see below), whose sum is σ = 301060543680. Its totient is φ = 160822938000.

The previous prime is 221131541117. The next prime is 221131541131. The reversal of 221131541125 is 521145131122.

It is not a de Polignac number, because 221131541125 - 2³ = 221131541117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221131541093 and 221131541102.

It is a congruent number.

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, 80410095 + ... + 80412844.

It is an arithmetic number, because the mean of its divisors is an integer number (18816283980).

Almost surely, 2^221131541125 is an apocalyptic number.

221131541125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221131541125 is a deficient number, since it is larger than the sum of its proper divisors (79929002555).

221131541125 is a wasteful number, since it uses less digits than its factorization.

221131541125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160822965 (or 160822955 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

Adding to 221131541125 its reverse (521145131122), we get a palindrome (742276672247).

The spelling of 221131541125 in words is "two hundred twenty-one billion, one hundred thirty-one million, five hundred forty-one thousand, one hundred twenty-five".