121220220320 has 48 divisors (see below), whose sum is σ = 286404255648. Its totient is φ = 48484450560.

The previous prime is 121220220263. The next prime is 121220220353. The reversal of 121220220320 is 23022022121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3397775 + ... + 3433265.

It is an arithmetic number, because the mean of its divisors is an integer number (5966755326).

Almost surely, 2^121220220320 is an apocalyptic number.

121220220320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220220320 is an abundant number, since it is smaller than the sum of its proper divisors (165184035328).

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

121220220320 is a wasteful number, since it uses less digits than its factorization.

121220220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56853 (or 56845 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 121220220320 its reverse (23022022121), we get a palindrome (144242242441).

The spelling of 121220220320 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, three hundred twenty".