121996120019 has 2 divisors, whose sum is σ = 121996120020. Its totient is φ = 121996120018.

The previous prime is 121996120007. The next prime is 121996120027. The reversal of 121996120019 is 910021699121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121996120019 is a prime.

It is a super-2 number, since 2×121996120019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121996120219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60998060009 + 60998060010.

It is an arithmetic number, because the mean of its divisors is an integer number (60998060010).

Almost surely, 2^121996120019 is an apocalyptic number.

121996120019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121996120019 is an equidigital number, since it uses as much as digits as its factorization.

121996120019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 121996120019 in words is "one hundred twenty-one billion, nine hundred ninety-six million, one hundred twenty thousand, nineteen".