1011113531 has 2 divisors, whose sum is σ = 1011113532. Its totient is φ = 1011113530.

The previous prime is 1011113527. The next prime is 1011113561. The reversal of 1011113531 is 1353111101.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1353111101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011113531 - 2² = 1011113527 is a prime.

It is a super-2 number, since 2×1011113531² = 2044701145142575922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011113561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505556765 + 505556766.

It is an arithmetic number, because the mean of its divisors is an integer number (505556766).

Almost surely, 2^1011113531 is an apocalyptic number.

1011113531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011113531 is an equidigital number, since it uses as much as digits as its factorization.

1011113531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 1011113531 is about 31798.0114315345. The cubic root of 1011113531 is about 1003.6908710446.

Adding to 1011113531 its reverse (1353111101), we get a palindrome (2364224632).

The spelling of 1011113531 in words is "one billion, eleven million, one hundred thirteen thousand, five hundred thirty-one".