1211011023131 has 24 divisors (see below), whose sum is σ = 1514114822304. Its totient is φ = 948284513280.

The previous prime is 1211011023127. The next prime is 1211011023139. The reversal of 1211011023131 is 1313201101121.

It is not a de Polignac number, because 1211011023131 - 2² = 1211011023127 is a prime.

It is a super-2 number, since 2×1211011023131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211011023139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5161940 + ... + 5391441.

It is an arithmetic number, because the mean of its divisors is an integer number (63088117596).

Almost surely, 2^{1211011023131} is an apocalyptic number.

1211011023131 is a deficient number, since it is larger than the sum of its proper divisors (303103799173).

1211011023131 is a wasteful number, since it uses less digits than its factorization.

1211011023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10553511 (or 10553498 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1211011023131 its reverse (1313201101121), we get a palindrome (2524212124252).

The spelling of 1211011023131 in words is "one trillion, two hundred eleven billion, eleven million, twenty-three thousand, one hundred thirty-one".