21110110102 has 16 divisors (see below), whose sum is σ = 33045384672. Its totient is φ = 10095078400.

The previous prime is 21110110067. The next prime is 21110110103. The reversal of 21110110102 is 20101101112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110110103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582102 + ... + 617302.

It is an arithmetic number, because the mean of its divisors is an integer number (2065336542).

Almost surely, 2^21110110102 is an apocalyptic number.

21110110102 is a deficient number, since it is larger than the sum of its proper divisors (11935274570).

21110110102 is a wasteful number, since it uses less digits than its factorization.

21110110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48263.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21110110102 its reverse (20101101112), we get a palindrome (41211211214).

The spelling of 21110110102 in words is "twenty-one billion, one hundred ten million, one hundred ten thousand, one hundred two".