21110101112212 has 24 divisors (see below), whose sum is σ = 43249963256640. Its totient is φ = 8826523112640.

The previous prime is 21110101112173. The next prime is 21110101112231. The reversal of 21110101112212 is 21221110101112.

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, 9194293762 + ... + 9194296057.

It is an arithmetic number, because the mean of its divisors is an integer number (1802081802360).

Almost surely, 2^{21110101112212} is an apocalyptic number.

It is an amenable number.

21110101112212 is an abundant number, since it is smaller than the sum of its proper divisors (22139862144428).

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

21110101112212 is a wasteful number, since it uses less digits than its factorization.

21110101112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18388589871 (or 18388589869 counting only the distinct ones).

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

Adding to 21110101112212 its reverse (21221110101112), we get a palindrome (42331211213324).

It can be divided in two parts, 21110101112 and 212, that multiplied together give a palindrome (4475341435744).

The spelling of 21110101112212 in words is "twenty-one trillion, one hundred ten billion, one hundred one million, one hundred twelve thousand, two hundred twelve".