121321213230 has 64 divisors (see below), whose sum is σ = 333830089728. Its totient is φ = 27641952000.

The previous prime is 121321213141. The next prime is 121321213243. The reversal of 121321213230 is 32312123121.

121321213230 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 121321213197 and 121321213206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 857146 + ... + 988605.

It is an arithmetic number, because the mean of its divisors is an integer number (5216095152).

Almost surely, 2^121321213230 is an apocalyptic number.

121321213230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321213230 is an abundant number, since it is smaller than the sum of its proper divisors (212508876498).

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

121321213230 is a wasteful number, since it uses less digits than its factorization.

121321213230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846081.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121321213230 its reverse (32312123121), we get a palindrome (153633336351).

The spelling of 121321213230 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred thirty".