1210321012 has 12 divisors (see below), whose sum is σ = 2120724900. Its totient is φ = 604399616.

The previous prime is 1210320997. The next prime is 1210321037. The reversal of 1210321012 is 2101230121.

It can be written as a sum of positive squares in 2 ways, for example, as 550653156 + 659667856 = 23466^2 + 25684^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1210320983 and 1210321001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186637 + ... + 193012.

It is an arithmetic number, because the mean of its divisors is an integer number (176727075).

Almost surely, 2^1210321012 is an apocalyptic number.

It is an amenable number.

1210321012 is a deficient number, since it is larger than the sum of its proper divisors (910403888).

1210321012 is a wasteful number, since it uses less digits than its factorization.

1210321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380450 (or 380448 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1210321012 is about 34789.6681789292. The cubic root of 1210321012 is about 1065.6964628986.

Adding to 1210321012 its reverse (2101230121), we get a palindrome (3311551133).

The spelling of 1210321012 in words is "one billion, two hundred ten million, three hundred twenty-one thousand, twelve".