121020119999 has 4 divisors (see below), whose sum is σ = 122677929936. Its totient is φ = 119362310064.

The previous prime is 121020119971. The next prime is 121020120017. The reversal of 121020119999 is 999911020121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121020119999 - 2¹² = 121020115903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020119939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828904859 + ... + 828905004.

It is an arithmetic number, because the mean of its divisors is an integer number (30669482484).

Almost surely, 2^121020119999 is an apocalyptic number.

121020119999 is a deficient number, since it is larger than the sum of its proper divisors (1657809937).

121020119999 is an equidigital number, since it uses as much as digits as its factorization.

121020119999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657809936.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 121020119999 in words is "one hundred twenty-one billion, twenty million, one hundred nineteen thousand, nine hundred ninety-nine".