1208430121 has 2 divisors, whose sum is σ = 1208430122. Its totient is φ = 1208430120.

The previous prime is 1208430109. The next prime is 1208430131. The reversal of 1208430121 is 1210348021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810028521 + 398401600 = 28461^2 + 19960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1208430121 - 2⁵ = 1208430089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1208430092 and 1208430101.

It is not a weakly prime, because it can be changed into another prime (1208430131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604215060 + 604215061.

It is an arithmetic number, because the mean of its divisors is an integer number (604215061).

Almost surely, 2^1208430121 is an apocalyptic number.

It is an amenable number.

1208430121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208430121 is an equidigital number, since it uses as much as digits as its factorization.

1208430121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1208430121 is about 34762.4815138390. The cubic root of 1208430121 is about 1065.1411925335.

Adding to 1208430121 its reverse (1210348021), we get a palindrome (2418778142).

The spelling of 1208430121 in words is "one billion, two hundred eight million, four hundred thirty thousand, one hundred twenty-one".