1211351241131 has 2 divisors, whose sum is σ = 1211351241132. Its totient is φ = 1211351241130.

The previous prime is 1211351241127. The next prime is 1211351241179. The reversal of 1211351241131 is 1311421531121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211351241131 - 2² = 1211351241127 is a prime.

It is a super-2 number, since 2×1211351241131² (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 1211351241131.

It is not a weakly prime, because it can be changed into another prime (1211351241181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605675620565 + 605675620566.

It is an arithmetic number, because the mean of its divisors is an integer number (605675620566).

Almost surely, 2^{1211351241131} is an apocalyptic number.

1211351241131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211351241131 is an equidigital number, since it uses as much as digits as its factorization.

1211351241131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 26.

Adding to 1211351241131 its reverse (1311421531121), we get a palindrome (2522772772252).

The spelling of 1211351241131 in words is "one trillion, two hundred eleven billion, three hundred fifty-one million, two hundred forty-one thousand, one hundred thirty-one".