1200201222121 has 4 divisors (see below), whose sum is σ = 1309310424144. Its totient is φ = 1091092020100.

The previous prime is 1200201222119. The next prime is 1200201222127. The reversal of 1200201222121 is 1212221020021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200201222121 - 2¹ = 1200201222119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200201222095 and 1200201222104.

It is not an unprimeable number, because it can be changed into a prime (1200201222127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54554600995 + ... + 54554601016.

It is an arithmetic number, because the mean of its divisors is an integer number (327327606036).

Almost surely, 2^{1200201222121} is an apocalyptic number.

1200201222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200201222121 is a deficient number, since it is larger than the sum of its proper divisors (109109202023).

1200201222121 is a wasteful number, since it uses less digits than its factorization.

1200201222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109109202022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1200201222121 its reverse (1212221020021), we get a palindrome (2412422242142).

The spelling of 1200201222121 in words is "one trillion, two hundred billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".