1121020541 has 4 divisors (see below), whose sum is σ = 1124026332. Its totient is φ = 1118014752.

The previous prime is 1121020519. The next prime is 1121020573. The reversal of 1121020541 is 1450201211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 384983641 + 736036900 = 19621^2 + 27130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121020541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121020141) 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, 1502336 + ... + 1503081.

It is an arithmetic number, because the mean of its divisors is an integer number (281006583).

Almost surely, 2^1121020541 is an apocalyptic number.

It is an amenable number.

1121020541 is a deficient number, since it is larger than the sum of its proper divisors (3005791).

1121020541 is an equidigital number, since it uses as much as digits as its factorization.

1121020541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005790.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1121020541 is about 33481.6448371343. The cubic root of 1121020541 is about 1038.8141503948.

Adding to 1121020541 its reverse (1450201211), we get a palindrome (2571221752).

The spelling of 1121020541 in words is "one billion, one hundred twenty-one million, twenty thousand, five hundred forty-one".