1121551131 has 4 divisors (see below), whose sum is σ = 1495401512. Its totient is φ = 747700752.

The previous prime is 1121551121. The next prime is 1121551159. The reversal of 1121551131 is 1311551211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1311551211 = 3 ⋅437183737.

It is not a de Polignac number, because 1121551131 - 2¹¹ = 1121549083 is a prime.

It is a super-2 number, since 2×1121551131² = 2515753878894758322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121551098 and 1121551107.

It is not an unprimeable number, because it can be changed into a prime (1121551121) 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, 186925186 + ... + 186925191.

It is an arithmetic number, because the mean of its divisors is an integer number (373850378).

Almost surely, 2^1121551131 is an apocalyptic number.

1121551131 is a deficient number, since it is larger than the sum of its proper divisors (373850381).

1121551131 is an equidigital number, since it uses as much as digits as its factorization.

1121551131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373850380.

The product of its digits is 150, while the sum is 21.

The square root of 1121551131 is about 33489.5674949677. The cubic root of 1121551131 is about 1038.9780181809.

The spelling of 1121551131 in words is "one billion, one hundred twenty-one million, five hundred fifty-one thousand, one hundred thirty-one".