121111021111999 has 8 divisors (see below), whose sum is σ = 121470459788720. Its totient is φ = 120752113758336.

The previous prime is 121111021111991. The next prime is 121111021112009. The reversal of 121111021111999 is 999111120111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121111021111999 - 2³ = 121111021111991 is a prime.

It is a super-3 number, since 3×121111021111999³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111021111991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132374202 + ... + 133285975.

It is an arithmetic number, because the mean of its divisors is an integer number (15183807473590).

Almost surely, 2^{121111021111999} is an apocalyptic number.

121111021111999 is a deficient number, since it is larger than the sum of its proper divisors (359438676721).

121111021111999 is an equidigital number, since it uses as much as digits as its factorization.

121111021111999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265661529.

The product of its (nonzero) digits is 2916, while the sum is 40.

The spelling of 121111021111999 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty-one million, one hundred eleven thousand, nine hundred ninety-nine".