1120400221 has 4 divisors (see below), whose sum is σ = 1120513500. Its totient is φ = 1120286944.

The previous prime is 1120400167. The next prime is 1120400243. The reversal of 1120400221 is 1220040211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151634596 + 968765625 = 12314^2 + 31125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120400221 - 2¹³ = 1120392029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120400291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40216 + ... + 62113.

It is an arithmetic number, because the mean of its divisors is an integer number (280128375).

Almost surely, 2^1120400221 is an apocalyptic number.

It is an amenable number.

1120400221 is a deficient number, since it is larger than the sum of its proper divisors (113279).

1120400221 is a wasteful number, since it uses less digits than its factorization.

1120400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113278.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1120400221 is about 33472.3799721502. The cubic root of 1120400221 is about 1038.6225047569.

Adding to 1120400221 its reverse (1220040211), we get a palindrome (2340440432).

The spelling of 1120400221 in words is "one billion, one hundred twenty million, four hundred thousand, two hundred twenty-one".