21110210202102 has 16 divisors (see below), whose sum is σ = 48251909033472. Its totient is φ = 6031488629160.

The previous prime is 21110210202091. The next prime is 21110210202161. The reversal of 21110210202102 is 20120201201112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251312026174 + ... + 251312026257.

It is an arithmetic number, because the mean of its divisors is an integer number (3015744314592).

Almost surely, 2^{21110210202102} is an apocalyptic number.

21110210202102 is an abundant number, since it is smaller than the sum of its proper divisors (27141698831370).

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

21110210202102 is a wasteful number, since it uses less digits than its factorization.

21110210202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502624052443.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21110210202102 its reverse (20120201201112), we get a palindrome (41230411403214).

The spelling of 21110210202102 in words is "twenty-one trillion, one hundred ten billion, two hundred ten million, two hundred two thousand, one hundred two".