1211011121131 has 8 divisors (see below), whose sum is σ = 1384080740064. Its totient is φ = 1037958509760.

The previous prime is 1211011121077. The next prime is 1211011121171. The reversal of 1211011121131 is 1311211101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211011121131 - 2¹⁹ = 1211010596843 is a prime.

It is a super-2 number, since 2×1211011121131² (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 (1211011121171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4098940 + ... + 4384441.

It is an arithmetic number, because the mean of its divisors is an integer number (173010092508).

Almost surely, 2^{1211011121131} is an apocalyptic number.

1211011121131 is a deficient number, since it is larger than the sum of its proper divisors (173069618933).

1211011121131 is an equidigital number, since it uses as much as digits as its factorization.

1211011121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8503781.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1211011121131 its reverse (1311211101121), we get a palindrome (2522222222252).

The spelling of 1211011121131 in words is "one trillion, two hundred eleven billion, eleven million, one hundred twenty-one thousand, one hundred thirty-one".