1211120212139 has 2 divisors, whose sum is σ = 1211120212140. Its totient is φ = 1211120212138.

The previous prime is 1211120212091. The next prime is 1211120212189. The reversal of 1211120212139 is 9312120211121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211120212139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211120212189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560106069 + 605560106070.

It is an arithmetic number, because the mean of its divisors is an integer number (605560106070).

Almost surely, 2^{1211120212139} is an apocalyptic number.

1211120212139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211120212139 is an equidigital number, since it uses as much as digits as its factorization.

1211120212139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 1211120212139 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred twelve thousand, one hundred thirty-nine".