121201110020 has 48 divisors (see below), whose sum is σ = 269605687680. Its totient is φ = 45609782784.

The previous prime is 121201110011. The next prime is 121201110031. The reversal of 121201110020 is 20011102121.

It is a junction number, because it is equal to n+sod(n) for n = 121201109983 and 121201110010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763577 + ... + 908543.

It is an arithmetic number, because the mean of its divisors is an integer number (5616785160).

Almost surely, 2^121201110020 is an apocalyptic number.

121201110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201110020 is an abundant number, since it is smaller than the sum of its proper divisors (148404577660).

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

121201110020 is a wasteful number, since it uses less digits than its factorization.

121201110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147452 (or 147450 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121201110020 its reverse (20011102121), we get a palindrome (141212212141).

The spelling of 121201110020 in words is "one hundred twenty-one billion, two hundred one million, one hundred ten thousand, twenty".