121120210120020 has 48 divisors (see below), whose sum is σ = 340220091865920. Its totient is φ = 32195531886336.

The previous prime is 121120210119989. The next prime is 121120210120033. The reversal of 121120210120020 is 20021012021121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3224693950 + ... + 3224731509.

It is an arithmetic number, because the mean of its divisors is an integer number (7087918580540).

Almost surely, 2^{121120210120020} is an apocalyptic number.

121120210120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120210120020 is an abundant number, since it is smaller than the sum of its proper divisors (219099881745900).

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

121120210120020 is a wasteful number, since it uses less digits than its factorization.

121120210120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6449425784 (or 6449425782 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121120210120020 its reverse (20021012021121), we get a palindrome (141141222141141).

The spelling of 121120210120020 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twenty thousand, twenty".