21211200112112 has 10 divisors (see below), whose sum is σ = 41096700217248. Its totient is φ = 10605600056048.

The previous prime is 21211200112087. The next prime is 21211200112121. The reversal of 21211200112112 is 21121100211212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662850003488 + ... + 662850003519.

Almost surely, 2^{21211200112112} is an apocalyptic number.

It is an amenable number.

21211200112112 is a deficient number, since it is larger than the sum of its proper divisors (19885500105136).

21211200112112 is a wasteful number, since it uses less digits than its factorization.

21211200112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325700007015 (or 1325700007009 counting only the distinct ones).

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

Adding to 21211200112112 its reverse (21121100211212), we get a palindrome (42332300323324).

The spelling of 21211200112112 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, one hundred twelve thousand, one hundred twelve".