121200221201220 has 72 divisors (see below), whose sum is σ = 420160766835264. Its totient is φ = 27702907702848.

The previous prime is 121200221201203. The next prime is 121200221201237. The reversal of 121200221201220 is 22102122002121.

It is a happy number.

121200221201220 is a `hidden beast` number, since 1 + 2 + 1 + 20 + 0 + 221 + 201 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (121200221201203) and next prime (121200221201237).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121200221201193 and 121200221201202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48095324614 + ... + 48095327133.

Almost surely, 2^{121200221201220} is an apocalyptic number.

121200221201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200221201220 is an abundant number, since it is smaller than the sum of its proper divisors (298960545634044).

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

121200221201220 is a wasteful number, since it uses less digits than its factorization.

121200221201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96190651769 (or 96190651764 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121200221201220 its reverse (22102122002121), we get a palindrome (143302343203341).

The spelling of 121200221201220 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty".