1011311212099 has 4 divisors (see below), whose sum is σ = 1012284563680. Its totient is φ = 1010337860520.

The previous prime is 1011311212097. The next prime is 1011311212133. The reversal of 1011311212099 is 9902121131101.

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

It is a cyclic number.

It is not a de Polignac number, because 1011311212099 - 2¹ = 1011311212097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011311212099.

It is not an unprimeable number, because it can be changed into a prime (1011311212097) 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, 486674232 + ... + 486676309.

It is an arithmetic number, because the mean of its divisors is an integer number (253071140920).

Almost surely, 2^{1011311212099} is an apocalyptic number.

1011311212099 is a deficient number, since it is larger than the sum of its proper divisors (973351581).

1011311212099 is an equidigital number, since it uses as much as digits as its factorization.

1011311212099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973351580.

The product of its (nonzero) digits is 972, while the sum is 31.

The spelling of 1011311212099 in words is "one trillion, eleven billion, three hundred eleven million, two hundred twelve thousand, ninety-nine".