1101213728 has 24 divisors (see below), whose sum is σ = 2180137680. Its totient is φ = 547528000.

The previous prime is 1101213727. The next prime is 1101213731. The reversal of 1101213728 is 8273121011.

It is a junction number, because it is equal to n+sod(n) for n = 1101213697 and 1101213706.

It is not an unprimeable number, because it can be changed into a prime (1101213727) 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, 90398 + ... + 101853.

It is an arithmetic number, because the mean of its divisors is an integer number (90839070).

Almost surely, 2^1101213728 is an apocalyptic number.

It is an amenable number.

1101213728 is a deficient number, since it is larger than the sum of its proper divisors (1078923952).

1101213728 is a wasteful number, since it uses less digits than its factorization.

1101213728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192440 (or 192432 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1101213728 is about 33184.5404970447. The cubic root of 1101213728 is about 1032.6596447738.

Adding to 1101213728 its reverse (8273121011), we get a palindrome (9374334739).

The spelling of 1101213728 in words is "one billion, one hundred one million, two hundred thirteen thousand, seven hundred twenty-eight".