1212000321 has 16 divisors (see below), whose sum is σ = 1863804800. Its totient is φ = 686216448.

The previous prime is 1212000313. The next prime is 1212000323. The reversal of 1212000321 is 1230002121.

It is not a de Polignac number, because 1212000321 - 2³ = 1212000313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212000297 and 1212000306.

It is not an unprimeable number, because it can be changed into a prime (1212000323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262456 + ... + 267033.

It is an arithmetic number, because the mean of its divisors is an integer number (116487800).

Almost surely, 2^1212000321 is an apocalyptic number.

It is an amenable number.

1212000321 is a deficient number, since it is larger than the sum of its proper divisors (651804479).

1212000321 is a wasteful number, since it uses less digits than its factorization.

1212000321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529608.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1212000321 is about 34813.7949813002. The cubic root of 1212000321 is about 1066.1891163851.

Adding to 1212000321 its reverse (1230002121), we get a palindrome (2442002442).

The spelling of 1212000321 in words is "one billion, two hundred twelve million, three hundred twenty-one", and thus it is an aban number.