121231331099999 has 4 divisors (see below), whose sum is σ = 121233784777920. Its totient is φ = 121228877422080.

The previous prime is 121231331099947. The next prime is 121231331100029. The reversal of 121231331099999 is 999990133132121.

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 121231331099999 - 2⁸ = 121231331099743 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 (121231331099929) 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, 1226764847 + ... + 1226863664.

It is an arithmetic number, because the mean of its divisors is an integer number (30308446194480).

Almost surely, 2^{121231331099999} is an apocalyptic number.

121231331099999 is a deficient number, since it is larger than the sum of its proper divisors (2453677921).

121231331099999 is an equidigital number, since it uses as much as digits as its factorization.

121231331099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453677920.

The product of its (nonzero) digits is 6377292, while the sum is 62.

The spelling of 121231331099999 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred thirty-one million, ninety-nine thousand, nine hundred ninety-nine".