1121023421 has 6 divisors (see below), whose sum is σ = 1304047710. Its totient is φ = 960877176.

The previous prime is 1121023417. The next prime is 1121023433. The reversal of 1121023421 is 1243201211.

It can be written as a sum of positive squares in only one way, i.e., 865183396 + 255840025 = 29414^2 + 15995^2 .

It is not a de Polignac number, because 1121023421 - 2² = 1121023417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121023421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121020421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11438966 + ... + 11439063.

It is an arithmetic number, because the mean of its divisors is an integer number (217341285).

Almost surely, 2^1121023421 is an apocalyptic number.

It is an amenable number.

1121023421 is a deficient number, since it is larger than the sum of its proper divisors (183024289).

1121023421 is an equidigital number, since it uses as much as digits as its factorization.

1121023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22878043 (or 22878036 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1121023421 is about 33481.6878457464. The cubic root of 1121023421 is about 1038.8150399956.

Adding to 1121023421 its reverse (1243201211), we get a palindrome (2364224632).

The spelling of 1121023421 in words is "one billion, one hundred twenty-one million, twenty-three thousand, four hundred twenty-one".