1200022121121 has 8 divisors (see below), whose sum is σ = 1602517879200. Its totient is φ = 798770555232.

The previous prime is 1200022121119. The next prime is 1200022121131. The reversal of 1200022121121 is 1211212200021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200022121121 - 2¹ = 1200022121119 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200022121121.

It is not an unprimeable number, because it can be changed into a prime (1200022121131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311045796 + ... + 311049653.

It is an arithmetic number, because the mean of its divisors is an integer number (200314734900).

Almost surely, 2^{1200022121121} is an apocalyptic number.

It is an amenable number.

1200022121121 is a deficient number, since it is larger than the sum of its proper divisors (402495758079).

1200022121121 is an equidigital number, since it uses as much as digits as its factorization.

1200022121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622096095.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1200022121121 its reverse (1211212200021), we get a palindrome (2411234321142).

The spelling of 1200022121121 in words is "one trillion, two hundred billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".