1011200000121 has 24 divisors (see below), whose sum is σ = 1501015678344. Its totient is φ = 655512480000.

The previous prime is 1011200000119. The next prime is 1011200000147. The reversal of 1011200000121 is 1210000021101.

It is a happy number.

1011200000121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2308322025 + 1008891678096 = 48045^2 + 1004436^2 .

It is not a de Polignac number, because 1011200000121 - 2¹ = 1011200000119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1011200000171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 382380 + ... + 1472621.

It is an arithmetic number, because the mean of its divisors is an integer number (62542319931).

Almost surely, 2^{1011200000121} is an apocalyptic number.

It is an amenable number.

1011200000121 is a deficient number, since it is larger than the sum of its proper divisors (489815678223).

1011200000121 is a wasteful number, since it uses less digits than its factorization.

1011200000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856681 (or 1856678 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1011200000121 its reverse (1210000021101), we get a palindrome (2221200021222).

The spelling of 1011200000121 in words is "one trillion, eleven billion, two hundred million, one hundred twenty-one", and thus it is an aban number.