21112211102 has 4 divisors (see below), whose sum is σ = 31668316656. Its totient is φ = 10556105550.

The previous prime is 21112211059. The next prime is 21112211119. The reversal of 21112211102 is 20111221112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278052774 + ... + 5278052777.

It is an arithmetic number, because the mean of its divisors is an integer number (7917079164).

Almost surely, 2^21112211102 is an apocalyptic number.

21112211102 is a deficient number, since it is larger than the sum of its proper divisors (10556105554).

21112211102 is a wasteful number, since it uses less digits than its factorization.

21112211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556105553.

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

Adding to 21112211102 its reverse (20111221112), we get a palindrome (41223432214).

It can be divided in two parts, 2111221110 and 2, that added together give a palindrome (2111221112).

The spelling of 21112211102 in words is "twenty-one billion, one hundred twelve million, two hundred eleven thousand, one hundred two".