121020199499 has 2 divisors, whose sum is σ = 121020199500. Its totient is φ = 121020199498.

The previous prime is 121020199459. The next prime is 121020199507. The reversal of 121020199499 is 994991020121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121020199499 - 2⁸ = 121020199243 is a prime.

It is a super-3 number, since 3×121020199499³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121020199429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510099749 + 60510099750.

It is an arithmetic number, because the mean of its divisors is an integer number (60510099750).

Almost surely, 2^121020199499 is an apocalyptic number.

121020199499 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020199499 is an equidigital number, since it uses as much as digits as its factorization.

121020199499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 121020199499 in words is "one hundred twenty-one billion, twenty million, one hundred ninety-nine thousand, four hundred ninety-nine".