1200321213 has 16 divisors (see below), whose sum is σ = 1969758336. Its totient is φ = 633136320.

The previous prime is 1200321179. The next prime is 1200321247. The reversal of 1200321213 is 3121230021.

It is an interprime number because it is at equal distance from previous prime (1200321179) and next prime (1200321247).

It is not a de Polignac number, because 1200321213 - 2⁶ = 1200321149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200321192 and 1200321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200321313) 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, 2198118 + ... + 2198663.

It is an arithmetic number, because the mean of its divisors is an integer number (123109896).

Almost surely, 2^1200321213 is an apocalyptic number.

1200321213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1200321213 is a deficient number, since it is larger than the sum of its proper divisors (769437123).

1200321213 is a wasteful number, since it uses less digits than its factorization.

1200321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396804.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1200321213 is about 34645.6521514605. The cubic root of 1200321213 is about 1062.7533773202.

Adding to 1200321213 its reverse (3121230021), we get a palindrome (4321551234).

The spelling of 1200321213 in words is "one billion, two hundred million, three hundred twenty-one thousand, two hundred thirteen".