121200213321 has 96 divisors (see below), whose sum is σ = 207088068096. Its totient is φ = 67476480000.

The previous prime is 121200213313. The next prime is 121200213341. The reversal of 121200213321 is 123312002121.

121200213321 is a `hidden beast` number, since 12 + 120 + 0 + 213 + 321 = 666.

It is not a de Polignac number, because 121200213321 - 2³ = 121200213313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121200213294 and 121200213303.

It is not an unprimeable number, because it can be changed into a prime (121200213311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31717591 + ... + 31721411.

It is an arithmetic number, because the mean of its divisors is an integer number (2157167376).

Almost surely, 2^121200213321 is an apocalyptic number.

121200213321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121200213321 is a deficient number, since it is larger than the sum of its proper divisors (85887854775).

121200213321 is a wasteful number, since it uses less digits than its factorization.

121200213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303 (or 4300 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121200213321 its reverse (123312002121), we get a palindrome (244512215442).

The spelling of 121200213321 in words is "one hundred twenty-one billion, two hundred million, two hundred thirteen thousand, three hundred twenty-one".