1230213121 has 16 divisors (see below), whose sum is σ = 1358899200. Its totient is φ = 1108494288.

The previous prime is 1230213079. The next prime is 1230213137. The reversal of 1230213121 is 1213120321.

It is a cyclic number.

It is not a de Polignac number, because 1230213121 - 2⁹ = 1230212609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230213095 and 1230213104.

It is not an unprimeable number, because it can be changed into a prime (1230213181) 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, 70360 + ... + 86086.

It is an arithmetic number, because the mean of its divisors is an integer number (84931200).

Almost surely, 2^1230213121 is an apocalyptic number.

It is an amenable number.

1230213121 is a deficient number, since it is larger than the sum of its proper divisors (128686079).

1230213121 is a wasteful number, since it uses less digits than its factorization.

1230213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15948.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1230213121 is about 35074.3940931273. The cubic root of 1230213121 is about 1071.5031486739.

Adding to 1230213121 its reverse (1213120321), we get a palindrome (2443333442).

The spelling of 1230213121 in words is "one billion, two hundred thirty million, two hundred thirteen thousand, one hundred twenty-one".