120101999989 has 2 divisors, whose sum is σ = 120101999990. Its totient is φ = 120101999988.

The previous prime is 120101999987. The next prime is 120102000019. The reversal of 120101999989 is 989999101021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62391547089 + 57710452900 = 249783^2 + 240230^2 .

It is a cyclic number.

It is not a de Polignac number, because 120101999989 - 2¹ = 120101999987 is a prime.

Together with 120101999987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120101999987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60050999994 + 60050999995.

It is an arithmetic number, because the mean of its divisors is an integer number (60050999995).

Almost surely, 2^120101999989 is an apocalyptic number.

It is an amenable number.

120101999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

120101999989 is an equidigital number, since it uses as much as digits as its factorization.

120101999989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 58.

The spelling of 120101999989 in words is "one hundred twenty billion, one hundred one million, nine hundred ninety-nine thousand, nine hundred eighty-nine".