121220332420 has 48 divisors (see below), whose sum is σ = 277728595200. Its totient is φ = 44076337920.

The previous prime is 121220332361. The next prime is 121220332477. The reversal of 121220332420 is 24233022121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121220332391 and 121220332400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4564741 + ... + 4591219.

It is an arithmetic number, because the mean of its divisors is an integer number (5786012400).

Almost surely, 2^121220332420 is an apocalyptic number.

121220332420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220332420 is an abundant number, since it is smaller than the sum of its proper divisors (156508262780).

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

121220332420 is a wasteful number, since it uses less digits than its factorization.

121220332420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47308 (or 47306 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 121220332420 its reverse (24233022121), we get a palindrome (145453354541).

The spelling of 121220332420 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred thirty-two thousand, four hundred twenty".