1102310021 has 4 divisors (see below), whose sum is σ = 1102619232. Its totient is φ = 1102000812.

The previous prime is 1102310009. The next prime is 1102310047. The reversal of 1102310021 is 1200132011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1200132011 = 13 ⋅92317847.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1102310021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1102309984 and 1102310011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102310071) 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, 149195 + ... + 156408.

It is an arithmetic number, because the mean of its divisors is an integer number (275654808).

Almost surely, 2^1102310021 is an apocalyptic number.

It is an amenable number.

1102310021 is a deficient number, since it is larger than the sum of its proper divisors (309211).

1102310021 is an equidigital number, since it uses as much as digits as its factorization.

1102310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309210.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1102310021 is about 33201.0545163855. The cubic root of 1102310021 is about 1033.0022128691.

Adding to 1102310021 its reverse (1200132011), we get a palindrome (2302442032).

The spelling of 1102310021 in words is "one billion, one hundred two million, three hundred ten thousand, twenty-one".