121120002100020 has 192 divisors, whose sum is σ = 423501994137600. Its totient is φ = 25127133258240.

The previous prime is 121120002100001. The next prime is 121120002100039. The reversal of 121120002100020 is 20001200021121.

It is an interprime number because it is at equal distance from previous prime (121120002100001) and next prime (121120002100039).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121120002099969 and 121120002100005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18316675 + ... + 24036234.

It is an arithmetic number, because the mean of its divisors is an integer number (2205739552800).

Almost surely, 2^{121120002100020} is an apocalyptic number.

121120002100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120002100020 is an abundant number, since it is smaller than the sum of its proper divisors (302381992037580).

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

121120002100020 is a wasteful number, since it uses less digits than its factorization.

121120002100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42353558 (or 42353556 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121120002100020 its reverse (20001200021121), we get a palindrome (141121202121141).

The spelling of 121120002100020 in words is "one hundred twenty-one trillion, one hundred twenty billion, two million, one hundred thousand, twenty".