1301212123 has 2 divisors, whose sum is σ = 1301212124. Its totient is φ = 1301212122.

The previous prime is 1301212117. The next prime is 1301212141. The reversal of 1301212123 is 3212121031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1301212123 - 2⁵ = 1301212091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1301212097 and 1301212106.

It is not a weakly prime, because it can be changed into another prime (1301212183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650606061 + 650606062.

It is an arithmetic number, because the mean of its divisors is an integer number (650606062).

Almost surely, 2^1301212123 is an apocalyptic number.

1301212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301212123 is an equidigital number, since it uses as much as digits as its factorization.

1301212123 is an evil number, because the sum of its binary digits is even.

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

The square root of 1301212123 is about 36072.3179598983. The cubic root of 1301212123 is about 1091.7319834379.

Adding to 1301212123 its reverse (3212121031), we get a palindrome (4513333154).

The spelling of 1301212123 in words is "one billion, three hundred one million, two hundred twelve thousand, one hundred twenty-three".