121102020019 has 2 divisors, whose sum is σ = 121102020020. Its totient is φ = 121102020018.

The previous prime is 121102019989. The next prime is 121102020023. The reversal of 121102020019 is 910020201121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121102020019 - 2⁷ = 121102019891 is a prime.

It is a super-2 number, since 2×121102020019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121102019978 and 121102020005.

It is not a weakly prime, because it can be changed into another prime (121102060019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551010009 + 60551010010.

It is an arithmetic number, because the mean of its divisors is an integer number (60551010010).

Almost surely, 2^121102020019 is an apocalyptic number.

121102020019 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102020019 is an equidigital number, since it uses as much as digits as its factorization.

121102020019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 121102020019 in words is "one hundred twenty-one billion, one hundred two million, twenty thousand, nineteen".