1212120210139 has 2 divisors, whose sum is σ = 1212120210140. Its totient is φ = 1212120210138.

The previous prime is 1212120210101. The next prime is 1212120210151. The reversal of 1212120210139 is 9310120212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212120210139 - 2³⁹ = 662364396251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212120210439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606060105069 + 606060105070.

It is an arithmetic number, because the mean of its divisors is an integer number (606060105070).

Almost surely, 2^{1212120210139} is an apocalyptic number.

1212120210139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212120210139 is an equidigital number, since it uses as much as digits as its factorization.

1212120210139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 1212120210139 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred ten thousand, one hundred thirty-nine".