1211331121131 has 32 divisors (see below), whose sum is σ = 1674744648192. Its totient is φ = 778221354240.

The previous prime is 1211331121129. The next prime is 1211331121157. The reversal of 1211331121131 is 1311211331121.

It is not a de Polignac number, because 1211331121131 - 2¹ = 1211331121129 is a prime.

It is a super-2 number, since 2×1211331121131² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211331121098 and 1211331121107.

It is not an unprimeable number, because it can be changed into a prime (1211331121171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98132946 + ... + 98145288.

It is an arithmetic number, because the mean of its divisors is an integer number (52335770256).

Almost surely, 2^{1211331121131} is an apocalyptic number.

1211331121131 is a deficient number, since it is larger than the sum of its proper divisors (463413527061).

1211331121131 is a wasteful number, since it uses less digits than its factorization.

1211331121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22083.

The product of its digits is 108, while the sum is 21.

Adding to 1211331121131 its reverse (1311211331121), we get a palindrome (2522542452252).

The spelling of 1211331121131 in words is "one trillion, two hundred eleven billion, three hundred thirty-one million, one hundred twenty-one thousand, one hundred thirty-one".