21212202223112 has 16 divisors (see below), whose sum is σ = 40159023627840. Its totient is φ = 10503129255696.

The previous prime is 21212202223081. The next prime is 21212202223123. The reversal of 21212202223112 is 21132220221212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12871481108 + ... + 12871482755.

It is an arithmetic number, because the mean of its divisors is an integer number (2509938976740).

Almost surely, 2^{21212202223112} is an apocalyptic number.

It is an amenable number.

21212202223112 is a deficient number, since it is larger than the sum of its proper divisors (18946821404728).

21212202223112 is a wasteful number, since it uses less digits than its factorization.

21212202223112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25742963972 (or 25742963968 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21212202223112 its reverse (21132220221212), we get a palindrome (42344422444324).

The spelling of 21212202223112 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, two hundred twenty-three thousand, one hundred twelve".