121202020019 has 2 divisors, whose sum is σ = 121202020020. Its totient is φ = 121202020018.

The previous prime is 121202019997. The next prime is 121202020099. The reversal of 121202020019 is 910020202121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121202020019 is a prime.

It is a super-2 number, since 2×121202020019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121202020099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601010009 + 60601010010.

It is an arithmetic number, because the mean of its divisors is an integer number (60601010010).

Almost surely, 2^121202020019 is an apocalyptic number.

121202020019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202020019 is an equidigital number, since it uses as much as digits as its factorization.

121202020019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 121202020019 in words is "one hundred twenty-one billion, two hundred two million, twenty thousand, nineteen".