1211104431031 has 8 divisors (see below), whose sum is σ = 1321214235264. Its totient is φ = 1100996193720.

The previous prime is 1211104431007. The next prime is 1211104431037. The reversal of 1211104431031 is 1301344011121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211104431031 - 2⁵ = 1211104430999 is a prime.

It is a super-2 number, since 2×1211104431031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211104430993 and 1211104431011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211104431037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718790 + ... + 2318716.

It is an arithmetic number, because the mean of its divisors is an integer number (165151779408).

Almost surely, 2^{1211104431031} is an apocalyptic number.

1211104431031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211104431031 is a deficient number, since it is larger than the sum of its proper divisors (110109804233).

1211104431031 is a wasteful number, since it uses less digits than its factorization.

1211104431031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783461.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 1211104431031 its reverse (1301344011121), we get a palindrome (2512448442152).

The spelling of 1211104431031 in words is "one trillion, two hundred eleven billion, one hundred four million, four hundred thirty-one thousand, thirty-one".