221042503355121 has 32 divisors (see below), whose sum is σ = 393949323724800. Its totient is φ = 119662107077520.

The previous prime is 221042503355119. The next prime is 221042503355143. The reversal of 221042503355121 is 121553305240122.

221042503355121 is a `hidden beast` number, since 2 + 2 + 1 + 0 + 4 + 2 + 50 + 33 + 551 + 21 = 666.

221042503355121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221042503355121 - 2¹ = 221042503355119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221042503355111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30777287325 + ... + 30777294506.

It is an arithmetic number, because the mean of its divisors is an integer number (12310916366400).

Almost surely, 2^{221042503355121} is an apocalyptic number.

221042503355121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221042503355121 is a deficient number, since it is larger than the sum of its proper divisors (172906820369679).

221042503355121 is a wasteful number, since it uses less digits than its factorization.

221042503355121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61554581866 (or 61554581860 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 221042503355121 its reverse (121553305240122), we get a palindrome (342595808595243).

The spelling of 221042503355121 in words is "two hundred twenty-one trillion, forty-two billion, five hundred three million, three hundred fifty-five thousand, one hundred twenty-one".