121011312299 has 4 divisors (see below), whose sum is σ = 121012020864. Its totient is φ = 121010603736.

The previous prime is 121011312287. The next prime is 121011312319. The reversal of 121011312299 is 992213110121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 992213110121 = 2543 ⋅390174247.

It is a cyclic number.

It is not a de Polignac number, because 121011312299 - 2⁸ = 121011312043 is a prime.

It is a super-2 number, since 2×121011312299² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121011312229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76469 + ... + 497865.

It is an arithmetic number, because the mean of its divisors is an integer number (30253005216).

Almost surely, 2^121011312299 is an apocalyptic number.

121011312299 is a deficient number, since it is larger than the sum of its proper divisors (708565).

121011312299 is an equidigital number, since it uses as much as digits as its factorization.

121011312299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708564.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 121011312299 in words is "one hundred twenty-one billion, eleven million, three hundred twelve thousand, two hundred ninety-nine".