1211100132031 has 4 divisors (see below), whose sum is σ = 1212543637200. Its totient is φ = 1209656626864.

The previous prime is 1211100131999. The next prime is 1211100132041. The reversal of 1211100132031 is 1302310011121.

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 1211100132031 - 2⁵ = 1211100131999 is a prime.

It is a super-2 number, since 2×1211100132031² (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 = 1211100131996 and 1211100132014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100132041) 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, 721751326 + ... + 721753003.

It is an arithmetic number, because the mean of its divisors is an integer number (303135909300).

Almost surely, 2^{1211100132031} is an apocalyptic number.

1211100132031 is a deficient number, since it is larger than the sum of its proper divisors (1443505169).

1211100132031 is an equidigital number, since it uses as much as digits as its factorization.

1211100132031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443505168.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1211100132031 its reverse (1302310011121), we get a palindrome (2513410143152).

The spelling of 1211100132031 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred thirty-two thousand, thirty-one".