1121011331 has 16 divisors (see below), whose sum is σ = 1298112480. Its totient is φ = 956743680.

The previous prime is 1121011319. The next prime is 1121011349. The reversal of 1121011331 is 1331101211.

It is a happy number.

It is not a de Polignac number, because 1121011331 - 2¹⁰ = 1121010307 is a prime.

It is a super-3 number, since 3×1121011331³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121011301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69155 + ... + 83811.

It is an arithmetic number, because the mean of its divisors is an integer number (81132030).

Almost surely, 2^1121011331 is an apocalyptic number.

1121011331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121011331 is a deficient number, since it is larger than the sum of its proper divisors (177101149).

1121011331 is a wasteful number, since it uses less digits than its factorization.

1121011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15094.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1121011331 is about 33481.5072988060. The cubic root of 1121011331 is about 1038.8113055155.

Adding to 1121011331 its reverse (1331101211), we get a palindrome (2452112542).

The spelling of 1121011331 in words is "one billion, one hundred twenty-one million, eleven thousand, three hundred thirty-one".