20211102 has 24 divisors (see below), whose sum is σ = 44975736. Its totient is φ = 6554736.

The previous prime is 20211097. The next prime is 20211109. The reversal of 20211102 is 20111202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14508 + ... + 15839.

It is an arithmetic number, because the mean of its divisors is an integer number (1873989).

Almost surely, 2^20211102 is an apocalyptic number.

20211102 is an abundant number, since it is smaller than the sum of its proper divisors (24764634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20211102 is a wasteful number, since it uses less digits than its factorization.

20211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30392 (or 30389 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20211102 is about 4495.6759224837. The cubic root of 20211102 is about 272.3934527203.

Adding to 20211102 its reverse (20111202), we get a palindrome (40322304).

The spelling of 20211102 in words is "twenty million, two hundred eleven thousand, one hundred two".