1212321193 has 2 divisors, whose sum is σ = 1212321194. Its totient is φ = 1212321192.

The previous prime is 1212321113. The next prime is 1212321233. The reversal of 1212321193 is 3911232121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1209091984 + 3229209 = 34772^2 + 1797^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212321193 - 2²⁵ = 1178766761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212321113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606160596 + 606160597.

It is an arithmetic number, because the mean of its divisors is an integer number (606160597).

Almost surely, 2^1212321193 is an apocalyptic number.

It is an amenable number.

1212321193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212321193 is an equidigital number, since it uses as much as digits as its factorization.

1212321193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 1212321193 is about 34818.4030794062. The cubic root of 1212321193 is about 1066.2831977815.

The spelling of 1212321193 in words is "one billion, two hundred twelve million, three hundred twenty-one thousand, one hundred ninety-three".