1211212244131 has 12 divisors (see below), whose sum is σ = 1278365490000. Its totient is φ = 1147419283248.

The previous prime is 1211212244129. The next prime is 1211212244159. The reversal of 1211212244131 is 1314422121121.

It is not a de Polignac number, because 1211212244131 - 2¹ = 1211212244129 is a prime.

It is a super-2 number, since 2×1211212244131² (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 = 1211212244096 and 1211212244105.

It is not an unprimeable number, because it can be changed into a prime (1211212244831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12470745 + ... + 12567493.

It is an arithmetic number, because the mean of its divisors is an integer number (106530457500).

Almost surely, 2^{1211212244131} is an apocalyptic number.

1211212244131 is a deficient number, since it is larger than the sum of its proper divisors (67153245869).

1211212244131 is an equidigital number, since it uses as much as digits as its factorization.

1211212244131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131466 (or 131447 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

Adding to 1211212244131 its reverse (1314422121121), we get a palindrome (2525634365252).

The spelling of 1211212244131 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred forty-four thousand, one hundred thirty-one".