121200011101221 has 16 divisors (see below), whose sum is σ = 174031191210240. Its totient is φ = 74584448199360.

The previous prime is 121200011101207. The next prime is 121200011101249. The reversal of 121200011101221 is 122101110002121.

It is a happy number.

121200011101221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 121200011101221 - 2⁹ = 121200011100709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121200011101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200011101021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14444676 + ... + 21237906.

It is an arithmetic number, because the mean of its divisors is an integer number (10876949450640).

Almost surely, 2^{121200011101221} is an apocalyptic number.

It is an amenable number.

121200011101221 is a deficient number, since it is larger than the sum of its proper divisors (52831180109019).

121200011101221 is a wasteful number, since it uses less digits than its factorization.

121200011101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250716.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121200011101221 its reverse (122101110002121), we get a palindrome (243301121103342).

The spelling of 121200011101221 in words is "one hundred twenty-one trillion, two hundred billion, eleven million, one hundred one thousand, two hundred twenty-one".