21120102102110 has 64 divisors (see below), whose sum is σ = 41495423883264. Its totient is φ = 7675738012800.

The previous prime is 21120102102083. The next prime is 21120102102137. The reversal of 21120102102110 is 1120120102112.

It is an interprime number because it is at equal distance from previous prime (21120102102083) and next prime (21120102102137).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2059889744 + ... + 2059899996.

It is an arithmetic number, because the mean of its divisors is an integer number (648365998176).

Almost surely, 2^{21120102102110} is an apocalyptic number.

21120102102110 is a deficient number, since it is larger than the sum of its proper divisors (20375321781154).

21120102102110 is a wasteful number, since it uses less digits than its factorization.

21120102102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18929.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21120102102110 its reverse (1120120102112), we get a palindrome (22240222204222).

It can be divided in two parts, 21120102 and 102110, that added together give a palindrome (21222212).

The spelling of 21120102102110 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, one hundred two thousand, one hundred ten".