1001201212139 has 2 divisors, whose sum is σ = 1001201212140. Its totient is φ = 1001201212138.

The previous prime is 1001201212013. The next prime is 1001201212147. The reversal of 1001201212139 is 9312121021001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001201212139 - 2²⁰ = 1001200163563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001201217139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500600606069 + 500600606070.

It is an arithmetic number, because the mean of its divisors is an integer number (500600606070).

Almost surely, 2^{1001201212139} is an apocalyptic number.

1001201212139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001201212139 is an equidigital number, since it uses as much as digits as its factorization.

1001201212139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 1001201212139 in words is "one trillion, one billion, two hundred one million, two hundred twelve thousand, one hundred thirty-nine".