1212123013 has 2 divisors, whose sum is σ = 1212123014. Its totient is φ = 1212123012.

The previous prime is 1212123007. The next prime is 1212123019. The reversal of 1212123013 is 3103212121.

It is a balanced prime because it is at equal distance from previous prime (1212123007) and next prime (1212123019).

It can be written as a sum of positive squares in only one way, i.e., 615933124 + 596189889 = 24818^2 + 24417^2 .

It is an emirp because it is prime and its reverse (3103212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212123013 - 2⁹ = 1212122501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212123019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061506 + 606061507.

It is an arithmetic number, because the mean of its divisors is an integer number (606061507).

Almost surely, 2^1212123013 is an apocalyptic number.

It is an amenable number.

1212123013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212123013 is an equidigital number, since it uses as much as digits as its factorization.

1212123013 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1212123013 is about 34815.5570542825. The cubic root of 1212123013 is about 1066.2250923000.

Adding to 1212123013 its reverse (3103212121), we get a palindrome (4315335134).

The spelling of 1212123013 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, thirteen".