121202021121220 has 24 divisors (see below), whose sum is σ = 274103032382424. Its totient is φ = 44751515490816.

The previous prime is 121202021121191. The next prime is 121202021121241. The reversal of 121202021121220 is 22121120202121.

It can be written as a sum of positive squares in 4 ways, for example, as 63689607424 + 121138331513796 = 252368^2 + 11006286^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233080809589 + ... + 233080810108.

It is an arithmetic number, because the mean of its divisors is an integer number (11420959682601).

Almost surely, 2^{121202021121220} is an apocalyptic number.

121202021121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202021121220 is an abundant number, since it is smaller than the sum of its proper divisors (152901011261204).

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

121202021121220 is a wasteful number, since it uses less digits than its factorization.

121202021121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466161619719 (or 466161619717 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121202021121220 its reverse (22121120202121), we get a palindrome (143323141323341).

The spelling of 121202021121220 in words is "one hundred twenty-one trillion, two hundred two billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty".