1211211032131 has 12 divisors (see below), whose sum is σ = 1257982435080. Its totient is φ = 1165481838720.

The previous prime is 1211211032123. The next prime is 1211211032153. The reversal of 1211211032131 is 1312301121121.

It is not a de Polignac number, because 1211211032131 - 2³ = 1211211032123 is a prime.

It is a super-2 number, since 2×1211211032131² (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 = 1211211032099 and 1211211032108.

It is not an unprimeable number, because it can be changed into a prime (1211211032231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2553301 + ... + 2990278.

It is an arithmetic number, because the mean of its divisors is an integer number (104831869590).

Almost surely, 2^{1211211032131} is an apocalyptic number.

1211211032131 is a deficient number, since it is larger than the sum of its proper divisors (46771402949).

1211211032131 is an frugal number, since it uses more digits than its factorization.

1211211032131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543766 (or 5543693 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1211211032131 its reverse (1312301121121), we get a palindrome (2523512153252).

The spelling of 1211211032131 in words is "one trillion, two hundred eleven billion, two hundred eleven million, thirty-two thousand, one hundred thirty-one".