1212212201939 has 2 divisors, whose sum is σ = 1212212201940. Its totient is φ = 1212212201938.

The previous prime is 1212212201917. The next prime is 1212212202017. The reversal of 1212212201939 is 9391022122121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212212201939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212212201899 and 1212212201908.

It is not a weakly prime, because it can be changed into another prime (1212212101939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606106100969 + 606106100970.

It is an arithmetic number, because the mean of its divisors is an integer number (606106100970).

Almost surely, 2^{1212212201939} is an apocalyptic number.

1212212201939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212212201939 is an equidigital number, since it uses as much as digits as its factorization.

1212212201939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 1212212201939 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, nine hundred thirty-nine".