1102210021 has 4 divisors (see below), whose sum is σ = 1202410944. Its totient is φ = 1002009100.

The previous prime is 1102210009. The next prime is 1102210049. The reversal of 1102210021 is 1200122011.

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: 1200122011 = 11 ⋅109102001.

It is a cyclic number.

It is not a de Polignac number, because 1102210021 - 2¹³ = 1102201829 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 (1102210001) 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, 50100445 + ... + 50100466.

It is an arithmetic number, because the mean of its divisors is an integer number (300602736).

Almost surely, 2^1102210021 is an apocalyptic number.

1102210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1102210021 is a deficient number, since it is larger than the sum of its proper divisors (100200923).

1102210021 is a wasteful number, since it uses less digits than its factorization.

1102210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100200922.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1102210021 is about 33199.5485059662. The cubic root of 1102210021 is about 1032.9709744264.

Adding to 1102210021 its reverse (1200122011), we get a palindrome (2302332032).

The spelling of 1102210021 in words is "one billion, one hundred two million, two hundred ten thousand, twenty-one".