1121532101 has 4 divisors (see below), whose sum is σ = 1121618604. Its totient is φ = 1121445600.

The previous prime is 1121532079. The next prime is 1121532131. The reversal of 1121532101 is 1012351211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1012830625 + 108701476 = 31825^2 + 10426^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121532101 - 2¹⁸ = 1121269957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121532101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121532131) 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, 19430 + ... + 51191.

It is an arithmetic number, because the mean of its divisors is an integer number (280404651).

Almost surely, 2^1121532101 is an apocalyptic number.

It is an amenable number.

1121532101 is a deficient number, since it is larger than the sum of its proper divisors (86503).

1121532101 is an equidigital number, since it uses as much as digits as its factorization.

1121532101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86502.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1121532101 is about 33489.2833754322. The cubic root of 1121532101 is about 1038.9721418361.

Adding to 1121532101 its reverse (1012351211), we get a palindrome (2133883312).

The spelling of 1121532101 in words is "one billion, one hundred twenty-one million, five hundred thirty-two thousand, one hundred one".