21111021102 has 8 divisors (see below), whose sum is σ = 42222042216. Its totient is φ = 7037007032.

The previous prime is 21111021101. The next prime is 21111021131. The reversal of 21111021102 is 20112011112.

It is a sphenic number, since it is the product of 3 distinct primes.

21111021102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759251753 + ... + 1759251764.

It is an arithmetic number, because the mean of its divisors is an integer number (5277755277).

Almost surely, 2^21111021102 is an apocalyptic number.

21111021102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21111021102 is a wasteful number, since it uses less digits than its factorization.

21111021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518503522.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21111021102 its reverse (20112011112), we get a palindrome (41223032214).

The spelling of 21111021102 in words is "twenty-one billion, one hundred eleven million, twenty-one thousand, one hundred two".