1121421204321 has 32 divisors (see below), whose sum is σ = 1659367047168. Its totient is φ = 667995531840.

The previous prime is 1121421204317. The next prime is 1121421204377. The reversal of 1121421204321 is 1234021241211.

It is not a de Polignac number, because 1121421204321 - 2² = 1121421204317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121421204291 and 1121421204300.

It is not an unprimeable number, because it can be changed into a prime (1121421204121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 801930 + ... + 1698803.

It is an arithmetic number, because the mean of its divisors is an integer number (51855220224).

Almost surely, 2^{1121421204321} is an apocalyptic number.

1121421204321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121421204321 is a deficient number, since it is larger than the sum of its proper divisors (537945842847).

1121421204321 is a wasteful number, since it uses less digits than its factorization.

1121421204321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500981.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1121421204321 its reverse (1234021241211), we get a palindrome (2355442445532).

The spelling of 1121421204321 in words is "one trillion, one hundred twenty-one billion, four hundred twenty-one million, two hundred four thousand, three hundred twenty-one".