1210331213 has 12 divisors (see below), whose sum is σ = 1516239900. Its totient is φ = 957624192.

The previous prime is 1210331189. The next prime is 1210331219. The reversal of 1210331213 is 3121330121.

It can be written as a sum of positive squares in 2 ways, for example, as 284833129 + 925498084 = 16877^2 + 30422^2 .

It is not a de Polignac number, because 1210331213 - 2¹² = 1210327117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210331191 and 1210331200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210331219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 949388 + ... + 950661.

It is an arithmetic number, because the mean of its divisors is an integer number (126353325).

Almost surely, 2^1210331213 is an apocalyptic number.

1210331213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1210331213 is a deficient number, since it is larger than the sum of its proper divisors (305908687).

1210331213 is a wasteful number, since it uses less digits than its factorization.

1210331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900076 (or 1900069 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1210331213 is about 34789.8147882394. The cubic root of 1210331213 is about 1065.6994569085.

Adding to 1210331213 its reverse (3121330121), we get a palindrome (4331661334).

The spelling of 1210331213 in words is "one billion, two hundred ten million, three hundred thirty-one thousand, two hundred thirteen".