21230021102 has 16 divisors (see below), whose sum is σ = 31978899792. Its totient is φ = 10570414080.

The previous prime is 21230021093. The next prime is 21230021143. The reversal of 21230021102 is 20112003212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3169577 + ... + 3176267.

It is an arithmetic number, because the mean of its divisors is an integer number (1998681237).

Almost surely, 2^21230021102 is an apocalyptic number.

21230021102 is a deficient number, since it is larger than the sum of its proper divisors (10748878690).

21230021102 is a wasteful number, since it uses less digits than its factorization.

21230021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13123.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21230021102 its reverse (20112003212), we get a palindrome (41342024314).

The spelling of 21230021102 in words is "twenty-one billion, two hundred thirty million, twenty-one thousand, one hundred two".