1102431121 has 6 divisors (see below), whose sum is σ = 1211763266. Its totient is φ = 1002210000.

The previous prime is 1102431097. The next prime is 1102431137. The reversal of 1102431121 is 1211342011.

It can be written as a sum of positive squares in only one way, i.e., 699867025 + 402564096 = 26455^2 + 20064^2 .

It is not a de Polignac number, because 1102431121 - 2⁵ = 1102431089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102431095 and 1102431104.

It is not an unprimeable number, because it can be changed into a prime (1102437121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4555380 + ... + 4555621.

Almost surely, 2^1102431121 is an apocalyptic number.

1102431121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1102431121 is a deficient number, since it is larger than the sum of its proper divisors (109332145).

1102431121 is an equidigital number, since it uses as much as digits as its factorization.

1102431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9111023 (or 9111012 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1102431121 is about 33202.8782035534. The cubic root of 1102431121 is about 1033.0400400940.

Adding to 1102431121 its reverse (1211342011), we get a palindrome (2313773132).

The spelling of 1102431121 in words is "one billion, one hundred two million, four hundred thirty-one thousand, one hundred twenty-one".