1011110112121 has 4 divisors (see below), whose sum is σ = 1011179224692. Its totient is φ = 1011040999552.

The previous prime is 1011110112113. The next prime is 1011110112139. The reversal of 1011110112121 is 1212110111101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83269182096 + 927840930025 = 288564^2 + 963245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011110112121 - 2³ = 1011110112113 is a prime.

It is a super-2 number, since 2×1011110112121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011110112151) 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, 34534336 + ... + 34563601.

It is an arithmetic number, because the mean of its divisors is an integer number (252794806173).

Almost surely, 2^{1011110112121} is an apocalyptic number.

It is an amenable number.

1011110112121 is a deficient number, since it is larger than the sum of its proper divisors (69112571).

1011110112121 is an equidigital number, since it uses as much as digits as its factorization.

1011110112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69112570.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1011110112121 its reverse (1212110111101), we get a palindrome (2223220223222).

It can be divided in two parts, 10111101 and 12121, that multiplied together give a palindrome (122556655221).

The spelling of 1011110112121 in words is "one trillion, eleven billion, one hundred ten million, one hundred twelve thousand, one hundred twenty-one".