121513403220 has 48 divisors (see below), whose sum is σ = 371168215488. Its totient is φ = 29457794560.

The previous prime is 121513403203. The next prime is 121513403287. The reversal of 121513403220 is 22304315121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92054949 + ... + 92056268.

It is an arithmetic number, because the mean of its divisors is an integer number (7732671156).

Almost surely, 2^121513403220 is an apocalyptic number.

121513403220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121513403220 is an abundant number, since it is smaller than the sum of its proper divisors (249654812268).

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

121513403220 is a wasteful number, since it uses less digits than its factorization.

121513403220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184111240 (or 184111238 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 121513403220 its reverse (22304315121), we get a palindrome (143817718341).

The spelling of 121513403220 in words is "one hundred twenty-one billion, five hundred thirteen million, four hundred three thousand, two hundred twenty".