1213255103 has 2 divisors, whose sum is σ = 1213255104. Its totient is φ = 1213255102.

The previous prime is 1213255079. The next prime is 1213255151. The reversal of 1213255103 is 3015523121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213255103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213251103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606627551 + 606627552.

It is an arithmetic number, because the mean of its divisors is an integer number (606627552).

Almost surely, 2^1213255103 is an apocalyptic number.

1213255103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213255103 is an equidigital number, since it uses as much as digits as its factorization.

1213255103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1213255103 is about 34831.8116525684. The cubic root of 1213255103 is about 1066.5569307792.

Adding to 1213255103 its reverse (3015523121), we get a palindrome (4228778224).

The spelling of 1213255103 in words is "one billion, two hundred thirteen million, two hundred fifty-five thousand, one hundred three".