1211120121131 has 4 divisors (see below), whose sum is σ = 1211310166752. Its totient is φ = 1210930075512.

The previous prime is 1211120121083. The next prime is 1211120121137. The reversal of 1211120121131 is 1311210211121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211120121131 is a prime.

It is a super-2 number, since 2×1211120121131² (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 (1211120121137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95013251 + ... + 95025996.

It is an arithmetic number, because the mean of its divisors is an integer number (302827541688).

Almost surely, 2^{1211120121131} is an apocalyptic number.

1211120121131 is a deficient number, since it is larger than the sum of its proper divisors (190045621).

1211120121131 is an equidigital number, since it uses as much as digits as its factorization.

1211120121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190045620.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1211120121131 its reverse (1311210211121), we get a palindrome (2522330332252).

The spelling of 1211120121131 in words is "one trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, one hundred thirty-one".