121102019999 has 4 divisors (see below), whose sum is σ = 121104299064. Its totient is φ = 121099740936.

The previous prime is 121102019989. The next prime is 121102020019. The reversal of 121102019999 is 999910201121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121102019999 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 (121102019939) 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, 1057877 + ... + 1166750.

It is an arithmetic number, because the mean of its divisors is an integer number (30276074766).

Almost surely, 2^121102019999 is an apocalyptic number.

121102019999 is a deficient number, since it is larger than the sum of its proper divisors (2279065).

121102019999 is an equidigital number, since it uses as much as digits as its factorization.

121102019999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279064.

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

The spelling of 121102019999 in words is "one hundred twenty-one billion, one hundred two million, nineteen thousand, nine hundred ninety-nine".