21202212111112 has 32 divisors (see below), whose sum is σ = 40095135590400. Its totient is φ = 10510292467584.

The previous prime is 21202212111097. The next prime is 21202212111127. The reversal of 21202212111112 is 21111121220212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21202212111097) and next prime (21202212111127).

It is a super-3 number, since 3×21202212111112³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21202212111112.

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, 5825412 + ... + 8737267.

It is an arithmetic number, because the mean of its divisors is an integer number (1252972987200).

Almost surely, 2^{21202212111112} is an apocalyptic number.

It is an amenable number.

21202212111112 is a deficient number, since it is larger than the sum of its proper divisors (18892923479288).

21202212111112 is a wasteful number, since it uses less digits than its factorization.

21202212111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14564245 (or 14564241 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21202212111112 its reverse (21111121220212), we get a palindrome (42313333331324).

The spelling of 21202212111112 in words is "twenty-one trillion, two hundred two billion, two hundred twelve million, one hundred eleven thousand, one hundred twelve".