21202213112 has 8 divisors (see below), whose sum is σ = 39754149600. Its totient is φ = 10601106552.

The previous prime is 21202213093. The next prime is 21202213127. The reversal of 21202213112 is 21131220212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×21202213112³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325138312 + ... + 1325138327.

It is an arithmetic number, because the mean of its divisors is an integer number (4969268700).

Almost surely, 2^21202213112 is an apocalyptic number.

It is an amenable number.

21202213112 is a deficient number, since it is larger than the sum of its proper divisors (18551936488).

21202213112 is a wasteful number, since it uses less digits than its factorization.

21202213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650276645 (or 2650276641 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21202213112 its reverse (21131220212), we get a palindrome (42333433324).

The spelling of 21202213112 in words is "twenty-one billion, two hundred two million, two hundred thirteen thousand, one hundred twelve".