121200020110021 has 8 divisors (see below), whose sum is σ = 121749373141760. Its totient is φ = 120650719357152.

The previous prime is 121200020109911. The next prime is 121200020110097. The reversal of 121200020110021 is 120011020002121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121200020110021 - 2¹³ = 121200020101829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200020109983 and 121200020110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200020120021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8418795 + ... + 17699608.

It is an arithmetic number, because the mean of its divisors is an integer number (15218671642720).

Almost surely, 2^{121200020110021} is an apocalyptic number.

It is an amenable number.

121200020110021 is a deficient number, since it is larger than the sum of its proper divisors (549353031739).

121200020110021 is a wasteful number, since it uses less digits than its factorization.

121200020110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139435.

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

Adding to 121200020110021 its reverse (120011020002121), we get a palindrome (241211040112142).

The spelling of 121200020110021 in words is "one hundred twenty-one trillion, two hundred billion, twenty million, one hundred ten thousand, twenty-one".