1011121120105 has 4 divisors (see below), whose sum is σ = 1213345344132. Its totient is φ = 808896896080.

The previous prime is 1011121120103. The next prime is 1011121120171. The reversal of 1011121120105 is 5010211211101.

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 228419952489 + 782701167616 = 477933^2 + 884704^2 .

It is not a de Polignac number, because 1011121120105 - 2¹ = 1011121120103 is a prime.

It is a super-2 number, since 2×1011121120105² (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 (1011121120103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101112112006 + ... + 101112112015.

It is an arithmetic number, because the mean of its divisors is an integer number (303336336033).

Almost surely, 2^{1011121120105} is an apocalyptic number.

It is an amenable number.

1011121120105 is a deficient number, since it is larger than the sum of its proper divisors (202224224027).

1011121120105 is an equidigital number, since it uses as much as digits as its factorization.

1011121120105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202224224026.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 1011121120105 its reverse (5010211211101), we get a palindrome (6021332331206).

The spelling of 1011121120105 in words is "one trillion, eleven billion, one hundred twenty-one million, one hundred twenty thousand, one hundred five".