1201120111231 has 4 divisors (see below), whose sum is σ = 1201125509352. Its totient is φ = 1201114713112.

The previous prime is 1201120111187. The next prime is 1201120111237. The reversal of 1201120111231 is 1321110211021.

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 1201120111231 - 2¹⁵ = 1201120078463 is a prime.

It is a super-2 number, since 2×1201120111231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201120111237) 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, 2350276 + ... + 2815321.

It is an arithmetic number, because the mean of its divisors is an integer number (300281377338).

Almost surely, 2^{1201120111231} is an apocalyptic number.

1201120111231 is a deficient number, since it is larger than the sum of its proper divisors (5398121).

1201120111231 is an equidigital number, since it uses as much as digits as its factorization.

1201120111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5398120.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1201120111231 its reverse (1321110211021), we get a palindrome (2522230322252).

It can be divided in two parts, 12011201 and 11231, that multiplied together give a palindrome (134897798431).

The spelling of 1201120111231 in words is "one trillion, two hundred one billion, one hundred twenty million, one hundred eleven thousand, two hundred thirty-one".