21110101112222 has 16 divisors (see below), whose sum is σ = 31712746592592. Its totient is φ = 10539186120960.

The previous prime is 21110101112173. The next prime is 21110101112231. The reversal of 21110101112222 is 22221110101112.

It is a self number, because there is not a number n which added to its sum of digits gives 21110101112222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114763628 + ... + 114947424.

It is an arithmetic number, because the mean of its divisors is an integer number (1982046662037).

Almost surely, 2^{21110101112222} is an apocalyptic number.

21110101112222 is a deficient number, since it is larger than the sum of its proper divisors (10602645480370).

21110101112222 is a wasteful number, since it uses less digits than its factorization.

21110101112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269803.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21110101112222 its reverse (22221110101112), we get a palindrome (43331211213334).

It can be divided in two parts, 21110101112 and 222, that multiplied together give a palindrome (4686442446864).

The spelling of 21110101112222 in words is "twenty-one trillion, one hundred ten billion, one hundred one million, one hundred twelve thousand, two hundred twenty-two".