1204312021 has 8 divisors (see below), whose sum is σ = 1314049824. Its totient is φ = 1094616720.

The previous prime is 1204312009. The next prime is 1204312061. The reversal of 1204312021 is 1202134021.

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

It is a cyclic number.

It is not a de Polignac number, because 1204312021 - 2⁷ = 1204311893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1204311986 and 1204312004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204312061) 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 7 ways as a sum of consecutive naturals, for example, 90615 + ... + 103051.

It is an arithmetic number, because the mean of its divisors is an integer number (164256228).

Almost surely, 2^1204312021 is an apocalyptic number.

1204312021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1204312021 is a deficient number, since it is larger than the sum of its proper divisors (109737803).

1204312021 is a wasteful number, since it uses less digits than its factorization.

1204312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21251.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1204312021 is about 34703.1990023975. The cubic root of 1204312021 is about 1063.9298826563.

Adding to 1204312021 its reverse (1202134021), we get a palindrome (2406446042).

The spelling of 1204312021 in words is "one billion, two hundred four million, three hundred twelve thousand, twenty-one".