1103212155 has 8 divisors (see below), whose sum is σ = 1765139472. Its totient is φ = 588379808.

The previous prime is 1103212139. The next prime is 1103212157. The reversal of 1103212155 is 5512123011.

1103212155 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1103212155 - 2⁴ = 1103212139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1103212157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36773724 + ... + 36773753.

It is an arithmetic number, because the mean of its divisors is an integer number (220642434).

Almost surely, 2^1103212155 is an apocalyptic number.

1103212155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1103212155 is a deficient number, since it is larger than the sum of its proper divisors (661927317).

1103212155 is an equidigital number, since it uses as much as digits as its factorization.

1103212155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73547485.

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

The square root of 1103212155 is about 33214.6376617298. The cubic root of 1103212155 is about 1033.2839401179.

Adding to 1103212155 its reverse (5512123011), we get a palindrome (6615335166).

The spelling of 1103212155 in words is "one billion, one hundred three million, two hundred twelve thousand, one hundred fifty-five".