1223040021 has 8 divisors (see below), whose sum is σ = 1863680064. Its totient is φ = 698880000.

The previous prime is 1223039999. The next prime is 1223040023. The reversal of 1223040021 is 1200403221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1223040021 - 2⁵ = 1223039989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223040023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29119980 + ... + 29120021.

It is an arithmetic number, because the mean of its divisors is an integer number (232960008).

Almost surely, 2^1223040021 is an apocalyptic number.

It is an amenable number.

1223040021 is a deficient number, since it is larger than the sum of its proper divisors (640640043).

1223040021 is an equidigital number, since it uses as much as digits as its factorization.

1223040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58240011.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1223040021 is about 34971.9890912713. The cubic root of 1223040021 is about 1069.4165220734.

Adding to 1223040021 its reverse (1200403221), we get a palindrome (2423443242).

The spelling of 1223040021 in words is "one billion, two hundred twenty-three million, forty thousand, twenty-one".