1230342121 has 4 divisors (see below), whose sum is σ = 1230412432. Its totient is φ = 1230271812.

The previous prime is 1230342119. The next prime is 1230342133. The reversal of 1230342121 is 1212430321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1212430321 = 569 ⋅2130809.

It is a cyclic number.

It is not a de Polignac number, because 1230342121 - 2¹ = 1230342119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230342161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14050 + ... + 51556.

It is an arithmetic number, because the mean of its divisors is an integer number (307603108).

Almost surely, 2^1230342121 is an apocalyptic number.

It is an amenable number.

1230342121 is a deficient number, since it is larger than the sum of its proper divisors (70311).

1230342121 is an equidigital number, since it uses as much as digits as its factorization.

1230342121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70310.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1230342121 is about 35076.2329932962. The cubic root of 1230342121 is about 1071.5405999287.

Adding to 1230342121 its reverse (1212430321), we get a palindrome (2442772442).

The spelling of 1230342121 in words is "one billion, two hundred thirty million, three hundred forty-two thousand, one hundred twenty-one".