121220200321 has 8 divisors (see below), whose sum is σ = 133032078144. Its totient is φ = 109540299120.

The previous prime is 121220200319. The next prime is 121220200331. The reversal of 121220200321 is 123002022121.

It is a happy number.

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 121220200321 - 2¹ = 121220200319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220200295 and 121220200304.

It is not an unprimeable number, because it can be changed into a prime (121220200301) 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, 32992230 + ... + 32995903.

It is an arithmetic number, because the mean of its divisors is an integer number (16629009768).

Almost surely, 2^121220200321 is an apocalyptic number.

121220200321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220200321 is a deficient number, since it is larger than the sum of its proper divisors (11811877823).

121220200321 is a wasteful number, since it uses less digits than its factorization.

121220200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65988311.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 121220200321 its reverse (123002022121), we get a palindrome (244222222442).

The spelling of 121220200321 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred thousand, three hundred twenty-one".