121200001000221 has 32 divisors (see below), whose sum is σ = 191217589839360. Its totient is φ = 67316396356800.

The previous prime is 121200001000219. The next prime is 121200001000279. The reversal of 121200001000221 is 122000100002121.

It is not a de Polignac number, because 121200001000221 - 2¹ = 121200001000219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121200001000197 and 121200001000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200001000021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1016190315 + ... + 1016309576.

It is an arithmetic number, because the mean of its divisors is an integer number (5975549682480).

Almost surely, 2^{121200001000221} is an apocalyptic number.

121200001000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121200001000221 is a deficient number, since it is larger than the sum of its proper divisors (70017588839139).

121200001000221 is a wasteful number, since it uses less digits than its factorization.

121200001000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032500057.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121200001000221 its reverse (122000100002121), we get a palindrome (243200101002342).

The spelling of 121200001000221 in words is "one hundred twenty-one trillion, two hundred billion, one million, two hundred twenty-one", and thus it is an aban number.