1203120232121 has 2 divisors, whose sum is σ = 1203120232122. Its totient is φ = 1203120232120.

The previous prime is 1203120232099. The next prime is 1203120232217. The reversal of 1203120232121 is 1212320213021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989617092025 + 213503140096 = 994795^2 + 462064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203120232121 - 2²² = 1203116037817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203120232093 and 1203120232102.

It is not a weakly prime, because it can be changed into another prime (1203120222121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601560116060 + 601560116061.

It is an arithmetic number, because the mean of its divisors is an integer number (601560116061).

Almost surely, 2^{1203120232121} is an apocalyptic number.

It is an amenable number.

1203120232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203120232121 is an equidigital number, since it uses as much as digits as its factorization.

1203120232121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1203120232121 its reverse (1212320213021), we get a palindrome (2415440445142).

The spelling of 1203120232121 in words is "one trillion, two hundred three billion, one hundred twenty million, two hundred thirty-two thousand, one hundred twenty-one".