121312123211020 has 48 divisors (see below), whose sum is σ = 291150232305408. Its totient is φ = 41592565586880.

The previous prime is 121312123211017. The next prime is 121312123211029. The reversal of 121312123211020 is 20112321213121.

It is a happy number.

121312123211020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 121312123210982 and 121312123211000.

It is not an unprimeable number, because it can be changed into a prime (121312123211029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37536655 + ... + 40640185.

It is an arithmetic number, because the mean of its divisors is an integer number (6065629839696).

Almost surely, 2^{121312123211020} is an apocalyptic number.

121312123211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121312123211020 is an abundant number, since it is smaller than the sum of its proper divisors (169838109094388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121312123211020 is a wasteful number, since it uses less digits than its factorization.

121312123211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382750 (or 3382748 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121312123211020 its reverse (20112321213121), we get a palindrome (141424444424141).

The spelling of 121312123211020 in words is "one hundred twenty-one trillion, three hundred twelve billion, one hundred twenty-three million, two hundred eleven thousand, twenty".