1100120222121 has 32 divisors (see below), whose sum is σ = 1492456762368. Its totient is φ = 720713622720.

The previous prime is 1100120222111. The next prime is 1100120222129. The reversal of 1100120222121 is 1212220210011.

It is not a de Polignac number, because 1100120222121 - 2¹⁵ = 1100120189353 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 1100120222121.

It is not an unprimeable number, because it can be changed into a prime (1100120222129) 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, 151674331 + ... + 151681583.

It is an arithmetic number, because the mean of its divisors is an integer number (46639273824).

Almost surely, 2^{1100120222121} is an apocalyptic number.

It is an amenable number.

1100120222121 is a deficient number, since it is larger than the sum of its proper divisors (392336540247).

1100120222121 is a wasteful number, since it uses less digits than its factorization.

1100120222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101.

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

Adding to 1100120222121 its reverse (1212220210011), we get a palindrome (2312340432132).

The spelling of 1100120222121 in words is "one trillion, one hundred billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".