1102123521 has 6 divisors (see below), whose sum is σ = 1591956210. Its totient is φ = 734749008.

The previous prime is 1102123513. The next prime is 1102123523. The reversal of 1102123521 is 1253212011.

It can be written as a sum of positive squares in only one way, i.e., 1056965121 + 45158400 = 32511^2 + 6720^2 .

It is not a de Polignac number, because 1102123521 - 2³ = 1102123513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1102123494 and 1102123503.

It is not an unprimeable number, because it can be changed into a prime (1102123523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61229076 + ... + 61229093.

It is an arithmetic number, because the mean of its divisors is an integer number (265326035).

Almost surely, 2^1102123521 is an apocalyptic number.

It is an amenable number.

1102123521 is a deficient number, since it is larger than the sum of its proper divisors (489832689).

1102123521 is a wasteful number, since it uses less digits than its factorization.

1102123521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122458175 (or 122458172 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1102123521 is about 33198.2457518466. The cubic root of 1102123521 is about 1032.9439516494.

Adding to 1102123521 its reverse (1253212011), we get a palindrome (2355335532).

The spelling of 1102123521 in words is "one billion, one hundred two million, one hundred twenty-three thousand, five hundred twenty-one".