221124897 has 60 divisors (see below), whose sum is σ = 387434320. Its totient is φ = 126023688.

The previous prime is 221124887. The next prime is 221124901. The reversal of 221124897 is 798421122.

It is not a de Polignac number, because 221124897 - 2⁷ = 221124769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221124847) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 583254 + ... + 583632.

Almost surely, 2^221124897 is an apocalyptic number.

221124897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

221124897 is a deficient number, since it is larger than the sum of its proper divisors (166309423).

221124897 is an frugal number, since it uses more digits than its factorization.

221124897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 389 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 221124897 is about 14870.2688946771. The cubic root of 221124897 is about 604.7082326044.

The spelling of 221124897 in words is "two hundred twenty-one million, one hundred twenty-four thousand, eight hundred ninety-seven".