1001121131 has 2 divisors, whose sum is σ = 1001121132. Its totient is φ = 1001121130.

The previous prime is 1001121119. The next prime is 1001121133. The reversal of 1001121131 is 1311211001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001121131 is a prime.

It is a super-2 number, since 2×1001121131² = 2004487037869438322, which contains 22 as substring.

Together with 1001121133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1001121133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500560565 + 500560566.

It is an arithmetic number, because the mean of its divisors is an integer number (500560566).

Almost surely, 2^1001121131 is an apocalyptic number.

1001121131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001121131 is an equidigital number, since it uses as much as digits as its factorization.

1001121131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1001121131 is about 31640.4982735734. The cubic root of 1001121131 is about 1000.3735707608.

Adding to 1001121131 its reverse (1311211001), we get a palindrome (2312332132).

The spelling of 1001121131 in words is "one billion, one million, one hundred twenty-one thousand, one hundred thirty-one".