120101121991 has 2 divisors, whose sum is σ = 120101121992. Its totient is φ = 120101121990.

The previous prime is 120101121967. The next prime is 120101121997. The reversal of 120101121991 is 199121101021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120101121991 - 2²¹ = 120099024839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120101121997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60050560995 + 60050560996.

It is an arithmetic number, because the mean of its divisors is an integer number (60050560996).

Almost surely, 2^120101121991 is an apocalyptic number.

120101121991 is a deficient number, since it is larger than the sum of its proper divisors (1).

120101121991 is an equidigital number, since it uses as much as digits as its factorization.

120101121991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 120101121991 in words is "one hundred twenty billion, one hundred one million, one hundred twenty-one thousand, nine hundred ninety-one".