1211011330131 has 6 divisors (see below), whose sum is σ = 1749238587980. Its totient is φ = 807340886748.

The previous prime is 1211011330093. The next prime is 1211011330147. The reversal of 1211011330131 is 1310331101121.

It is not a de Polignac number, because 1211011330131 - 2¹¹ = 1211011328083 is a prime.

It is a super-2 number, since 2×1211011330131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211011330831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67278407221 + ... + 67278407238.

Almost surely, 2^{1211011330131} is an apocalyptic number.

1211011330131 is a deficient number, since it is larger than the sum of its proper divisors (538227257849).

1211011330131 is a wasteful number, since it uses less digits than its factorization.

1211011330131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134556814465 (or 134556814462 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 1211011330131 its reverse (1310331101121), we get a palindrome (2521342431252).

The spelling of 1211011330131 in words is "one trillion, two hundred eleven billion, eleven million, three hundred thirty thousand, one hundred thirty-one".