221189501298481 has 9 divisors (see below), whose sum is σ = 224349795517369. Its totient is φ = 218073115138900.

The previous prime is 221189501298439. The next prime is 221189501298533. The reversal of 221189501298481 is 184892105981122.

The square root of 221189501298481 is 14872441.

It is a perfect power (a square), and thus also a powerful number.

221189501298481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221189501298481 - 2⁹ = 221189501297969 is a prime.

It is a super-2 number, since 2×221189501298481² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221189501298401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1055838576 + ... + 1056048046.

Almost surely, 2^{221189501298481} is an apocalyptic number.

221189501298481 is the 14872441-st square number.

221189501298481 is the 7436221-st centered octagonal number.

It is an amenable number.

221189501298481 is a deficient number, since it is larger than the sum of its proper divisors (3160294218888).

221189501298481 is an frugal number, since it uses more digits than its factorization.

221189501298481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419084 (or 209542 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 61.

The spelling of 221189501298481 in words is "two hundred twenty-one trillion, one hundred eighty-nine billion, five hundred one million, two hundred ninety-eight thousand, four hundred eighty-one".