21210011102 has 16 divisors (see below), whose sum is σ = 36361978080. Its totient is φ = 9089515008.

The previous prime is 21210011101. The next prime is 21210011129. The reversal of 21210011102 is 20111001212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210011101) by changing a digit.

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, 372974 + ... + 426062.

It is an arithmetic number, because the mean of its divisors is an integer number (2272623630).

Almost surely, 2^21210011102 is an apocalyptic number.

21210011102 is a deficient number, since it is larger than the sum of its proper divisors (15151966978).

21210011102 is a wasteful number, since it uses less digits than its factorization.

21210011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81635.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210011102 its reverse (20111001212), we get a palindrome (41321012314).

The spelling of 21210011102 in words is "twenty-one billion, two hundred ten million, eleven thousand, one hundred two".