121201210320 has 320 divisors, whose sum is σ = 429446085120. Its totient is φ = 28092596224.

The previous prime is 121201210313. The next prime is 121201210409. The reversal of 121201210320 is 23012102121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121201210320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2699092 + ... + 2743628.

It is an arithmetic number, because the mean of its divisors is an integer number (1342019016).

Almost surely, 2^121201210320 is an apocalyptic number.

121201210320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121201210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214723042560).

121201210320 is an abundant number, since it is smaller than the sum of its proper divisors (308244874800).

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

121201210320 is a wasteful number, since it uses less digits than its factorization.

121201210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44622 (or 44616 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121201210320 its reverse (23012102121), we get a palindrome (144213312441).

The spelling of 121201210320 in words is "one hundred twenty-one billion, two hundred one million, two hundred ten thousand, three hundred twenty".