1102020221 has 4 divisors (see below), whose sum is σ = 1118468352. Its totient is φ = 1085572092.

The previous prime is 1102020187. The next prime is 1102020251. The reversal of 1102020221 is 1220202011.

It is a happy number.

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 1102020221 - 2²⁶ = 1034911357 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 (1102020251) 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, 8223965 + ... + 8224098.

It is an arithmetic number, because the mean of its divisors is an integer number (279617088).

Almost surely, 2^1102020221 is an apocalyptic number.

It is an amenable number.

1102020221 is a deficient number, since it is larger than the sum of its proper divisors (16448131).

1102020221 is an equidigital number, since it uses as much as digits as its factorization.

1102020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448130.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1102020221 is about 33196.6899102908. The cubic root of 1102020221 is about 1032.9116786655.

Adding to 1102020221 its reverse (1220202011), we get a palindrome (2322222232).

The spelling of 1102020221 in words is "one billion, one hundred two million, twenty thousand, two hundred twenty-one".