121200100201021 has 8 divisors (see below), whose sum is σ = 127620731784800. Its totient is φ = 114783636511440.

The previous prime is 121200100200997. The next prime is 121200100201099. The reversal of 121200100201021 is 120102001002121.

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 121200100201021 - 2³⁵ = 121165740462653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200100200992 and 121200100201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200100901021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041913851 + ... + 1042030168.

It is an arithmetic number, because the mean of its divisors is an integer number (15952591473100).

Almost surely, 2^{121200100201021} is an apocalyptic number.

It is an amenable number.

121200100201021 is a deficient number, since it is larger than the sum of its proper divisors (6420631583779).

121200100201021 is a wasteful number, since it uses less digits than its factorization.

121200100201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083947099.

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

Adding to 121200100201021 its reverse (120102001002121), we get a palindrome (241302101203142).

The spelling of 121200100201021 in words is "one hundred twenty-one trillion, two hundred billion, one hundred million, two hundred one thousand, twenty-one".