10121221121239 has 2 divisors, whose sum is σ = 10121221121240. Its totient is φ = 10121221121238.

The previous prime is 10121221121191. The next prime is 10121221121251. The reversal of 10121221121239 is 93212112212101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10121221121239 - 2¹⁵ = 10121221088471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121221121269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060610560619 + 5060610560620.

It is an arithmetic number, because the mean of its divisors is an integer number (5060610560620).

Almost surely, 2^{10121221121239} is an apocalyptic number.

10121221121239 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121221121239 is an equidigital number, since it uses as much as digits as its factorization.

10121221121239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 10121221121239 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-nine".