1202312021111 has 4 divisors (see below), whose sum is σ = 1230272765832. Its totient is φ = 1174351276392.

The previous prime is 1202312021087. The next prime is 1202312021149. The reversal of 1202312021111 is 1111202132021.

It is a happy number.

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 1202312021111 - 2²² = 1202307826807 is a prime.

It is a super-2 number, since 2×1202312021111² (a number of 25 digits) contains 22 as substring.

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 1202312021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202312021191) 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, 13980372296 + ... + 13980372381.

It is an arithmetic number, because the mean of its divisors is an integer number (307568191458).

Almost surely, 2^{1202312021111} is an apocalyptic number.

1202312021111 is a deficient number, since it is larger than the sum of its proper divisors (27960744721).

1202312021111 is an equidigital number, since it uses as much as digits as its factorization.

1202312021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27960744720.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1202312021111 its reverse (1111202132021), we get a palindrome (2313514153132).

The spelling of 1202312021111 in words is "one trillion, two hundred two billion, three hundred twelve million, twenty-one thousand, one hundred eleven".