1155322101 has 4 divisors (see below), whose sum is σ = 1540429472. Its totient is φ = 770214732.

The previous prime is 1155322099. The next prime is 1155322109. The reversal of 1155322101 is 1012235511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1155322101 - 2¹ = 1155322099 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 (1155322109) 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, 192553681 + ... + 192553686.

It is an arithmetic number, because the mean of its divisors is an integer number (385107368).

Almost surely, 2^1155322101 is an apocalyptic number.

It is an amenable number.

1155322101 is a deficient number, since it is larger than the sum of its proper divisors (385107371).

1155322101 is an equidigital number, since it uses as much as digits as its factorization.

1155322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385107370.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1155322101 is about 33990.0294351152. The cubic root of 1155322101 is about 1049.3032720285.

Adding to 1155322101 its reverse (1012235511), we get a palindrome (2167557612).

The spelling of 1155322101 in words is "one billion, one hundred fifty-five million, three hundred twenty-two thousand, one hundred one".