1011112312129 has 4 divisors (see below), whose sum is σ = 1011449240260. Its totient is φ = 1010775384000.

The previous prime is 1011112312123. The next prime is 1011112312141. The reversal of 1011112312129 is 9212132111101.

It is a happy number.

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 542609024400 + 468503287729 = 736620^2 + 684473^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011112312129 - 2¹⁵ = 1011112279361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011112312123) 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, 168459564 + ... + 168465565.

It is an arithmetic number, because the mean of its divisors is an integer number (252862310065).

Almost surely, 2^{1011112312129} is an apocalyptic number.

It is an amenable number.

1011112312129 is a deficient number, since it is larger than the sum of its proper divisors (336928131).

1011112312129 is an equidigital number, since it uses as much as digits as its factorization.

1011112312129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336928130.

The product of its (nonzero) digits is 216, while the sum is 25.

The spelling of 1011112312129 in words is "one trillion, eleven billion, one hundred twelve million, three hundred twelve thousand, one hundred twenty-nine".