1211031011031 has 8 divisors (see below), whose sum is σ = 1614748062720. Its totient is φ = 807333983352.

The previous prime is 1211031010963. The next prime is 1211031011077. The reversal of 1211031011031 is 1301101301121.

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

It is not a de Polignac number, because 1211031011031 - 2¹⁷ = 1211030879959 is a prime.

It is a super-2 number, since 2×1211031011031² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211031011031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211031011431) 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, 4864311 + ... + 5107208.

It is an arithmetic number, because the mean of its divisors is an integer number (201843507840).

Almost surely, 2^{1211031011031} is an apocalyptic number.

1211031011031 is a deficient number, since it is larger than the sum of its proper divisors (403717051689).

1211031011031 is an equidigital number, since it uses as much as digits as its factorization.

1211031011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012005.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 1211031011031 its reverse (1301101301121), we get a palindrome (2512132312152).

The spelling of 1211031011031 in words is "one trillion, two hundred eleven billion, thirty-one million, eleven thousand, thirty-one".