224665572121 has 27 divisors (see below), whose sum is σ = 234760506687. Its totient is φ = 215001410400.

The previous prime is 224665572101. The next prime is 224665572139. The reversal of 224665572121 is 121275566422.

The square root of 224665572121 is 473989.

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

It can be written as a sum of positive squares in only one way, i.e., 127531123225 + 97134448896 = 357115^2 + 311664^2 .

It is not a de Polignac number, because 224665572121 - 2³³ = 216075637529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (224665572101) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1487851396 + ... + 1487851546.

It is an arithmetic number, because the mean of its divisors is an integer number (8694833581).

Almost surely, 2^224665572121 is an apocalyptic number.

224665572121 is the 473989-th square number.

224665572121 is the 236995-th centered octagonal number.

It is an amenable number.

224665572121 is a deficient number, since it is larger than the sum of its proper divisors (10094934566).

224665572121 is an frugal number, since it uses more digits than its factorization.

224665572121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 267 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 224665572121 in words is "two hundred twenty-four billion, six hundred sixty-five million, five hundred seventy-two thousand, one hundred twenty-one".