121121120020000 has 60 divisors (see below), whose sum is σ = 297976123466406. Its totient is φ = 48448448000000.

The previous prime is 121121120019973. The next prime is 121121120020003. The reversal of 121121120020000 is 20021121121.

It can be written as a sum of positive squares in 5 ways, for example, as 586455766416 + 120534664253584 = 765804^2 + 10978828^2 .

It is not an unprimeable number, because it can be changed into a prime (121121120020003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3028008001 + ... + 3028048000.

Almost surely, 2^{121121120020000} is an apocalyptic number.

121121120020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121120020000 is an abundant number, since it is smaller than the sum of its proper divisors (176855003446406).

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

121121120020000 is an frugal number, since it uses more digits than its factorization.

121121120020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056056031 (or 6056056008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121121120020000 its reverse (20021121121), we get a palindrome (121141141141121).

The spelling of 121121120020000 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, twenty thousand".