1102021021 has 4 divisors (see below), whose sum is σ = 1102613152. Its totient is φ = 1101428892.

The previous prime is 1102021009. The next prime is 1102021027. The reversal of 1102021021 is 1201202011.

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.

It is a cyclic number.

It is not a de Polignac number, because 1102021021 - 2⁷ = 1102020893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102020989 and 1102021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102021027) 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, 293265 + ... + 296998.

It is an arithmetic number, because the mean of its divisors is an integer number (275653288).

Almost surely, 2^1102021021 is an apocalyptic number.

It is an amenable number.

1102021021 is a deficient number, since it is larger than the sum of its proper divisors (592131).

1102021021 is an equidigital number, since it uses as much as digits as its factorization.

1102021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592130.

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

The square root of 1102021021 is about 33196.7019596827. The cubic root of 1102021021 is about 1032.9119286092.

Adding to 1102021021 its reverse (1201202011), we get a palindrome (2303223032).

It can be divided in two parts, 11020 and 21021, that added together give a square (32041 = 179²).

The spelling of 1102021021 in words is "one billion, one hundred two million, twenty-one thousand, twenty-one".