121220021020019 has 2 divisors, whose sum is σ = 121220021020020. Its totient is φ = 121220021020018.

The previous prime is 121220021020003. The next prime is 121220021020057. The reversal of 121220021020019 is 910020120022121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220021020019 - 2⁴ = 121220021020003 is a prime.

It is a super-2 number, since 2×121220021020019² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121220021019976 and 121220021020003.

It is not a weakly prime, because it can be changed into another prime (121220021020619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610010510009 + 60610010510010.

It is an arithmetic number, because the mean of its divisors is an integer number (60610010510010).

Almost surely, 2^{121220021020019} is an apocalyptic number.

121220021020019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220021020019 is an equidigital number, since it uses as much as digits as its factorization.

121220021020019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 121220021020019 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, twenty thousand, nineteen".