1230521210 has 16 divisors (see below), whose sum is σ = 2274802056. Its totient is φ = 478905408.

The previous prime is 1230521207. The next prime is 1230521213. The reversal of 1230521210 is 121250321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1230521207) and next prime (1230521213).

It can be written as a sum of positive squares in 4 ways, for example, as 811623121 + 418898089 = 28489^2 + 20467^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1230521213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1662497 + ... + 1663236.

Almost surely, 2^1230521210 is an apocalyptic number.

1230521210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1230521210 is a deficient number, since it is larger than the sum of its proper divisors (1044280846).

1230521210 is a wasteful number, since it uses less digits than its factorization.

1230521210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325777.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1230521210 is about 35078.7857543559. The cubic root of 1230521210 is about 1071.5925886725.

Adding to 1230521210 its reverse (121250321), we get a palindrome (1351771531).

The spelling of 1230521210 in words is "one billion, two hundred thirty million, five hundred twenty-one thousand, two hundred ten".