1200011201221 has 16 divisors (see below), whose sum is σ = 1374204810240. Its totient is φ = 1026509702400.

The previous prime is 1200011201201. The next prime is 1200011201231. The reversal of 1200011201221 is 1221021100021.

It is not a de Polignac number, because 1200011201221 - 2⁷ = 1200011201093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200011201201) 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, 11851035 + ... + 11951863.

It is an arithmetic number, because the mean of its divisors is an integer number (85887800640).

Almost surely, 2^{1200011201221} is an apocalyptic number.

It is an amenable number.

1200011201221 is a deficient number, since it is larger than the sum of its proper divisors (174193609019).

1200011201221 is a wasteful number, since it uses less digits than its factorization.

1200011201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104244.

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

Adding to 1200011201221 its reverse (1221021100021), we get a palindrome (2421032301242).

The spelling of 1200011201221 in words is "one trillion, two hundred billion, eleven million, two hundred one thousand, two hundred twenty-one".