1211120416231 has 4 divisors (see below), whose sum is σ = 1321222272264. Its totient is φ = 1101018560200.

The previous prime is 1211120416193. The next prime is 1211120416237. The reversal of 1211120416231 is 1326140211121.

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 1211120416231 - 2⁹ = 1211120415719 is a prime.

It is a super-2 number, since 2×1211120416231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211120416196 and 1211120416205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211120416237) 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, 55050928000 + ... + 55050928021.

It is an arithmetic number, because the mean of its divisors is an integer number (330305568066).

Almost surely, 2^{1211120416231} is an apocalyptic number.

1211120416231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211120416231 is a deficient number, since it is larger than the sum of its proper divisors (110101856033).

1211120416231 is a wasteful number, since it uses less digits than its factorization.

1211120416231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110101856032.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 1211120416231 its reverse (1326140211121), we get a palindrome (2537260627352).

The spelling of 1211120416231 in words is "one trillion, two hundred eleven billion, one hundred twenty million, four hundred sixteen thousand, two hundred thirty-one".