1011112210121 has 4 divisors (see below), whose sum is σ = 1088890072452. Its totient is φ = 933334347792.

The previous prime is 1011112210099. The next prime is 1011112210151. The reversal of 1011112210121 is 1210122111101.

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 529838410000 + 481273800121 = 727900^2 + 693739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011112210121 - 2¹⁰ = 1011112209097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011112210096 and 1011112210105.

It is not an unprimeable number, because it can be changed into a prime (1011112210151) 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, 38888931146 + ... + 38888931171.

It is an arithmetic number, because the mean of its divisors is an integer number (272222518113).

Almost surely, 2^{1011112210121} is an apocalyptic number.

It is an amenable number.

1011112210121 is a deficient number, since it is larger than the sum of its proper divisors (77777862331).

1011112210121 is an equidigital number, since it uses as much as digits as its factorization.

1011112210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77777862330.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011112210121 its reverse (1210122111101), we get a palindrome (2221234321222).

The spelling of 1011112210121 in words is "one trillion, eleven billion, one hundred twelve million, two hundred ten thousand, one hundred twenty-one".