121211201212320 has 96 divisors (see below), whose sum is σ = 381940514827200. Its totient is φ = 32312385423360.

The previous prime is 121211201212279. The next prime is 121211201212337. The reversal of 121211201212320 is 23212102112121.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39947326 + ... + 42874365.

It is an arithmetic number, because the mean of its divisors is an integer number (3978547029450).

Almost surely, 2^{121211201212320} is an apocalyptic number.

121211201212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211201212320 is an abundant number, since it is smaller than the sum of its proper divisors (260729313614880).

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

121211201212320 is a wasteful number, since it uses less digits than its factorization.

121211201212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82824758 (or 82824750 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121211201212320 its reverse (23212102112121), we get a palindrome (144423303324441).

The spelling of 121211201212320 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred one million, two hundred twelve thousand, three hundred twenty".