21301211112 has 16 divisors (see below), whose sum is σ = 53253027840. Its totient is φ = 7100403696.

The previous prime is 21301211101. The next prime is 21301211117. The reversal of 21301211112 is 21111210312.

It is a junction number, because it is equal to n+sod(n) for n = 21301211091 and 21301211100.

It is not an unprimeable number, because it can be changed into a prime (21301211117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443775208 + ... + 443775255.

It is an arithmetic number, because the mean of its divisors is an integer number (3328314240).

Almost surely, 2^21301211112 is an apocalyptic number.

It is an amenable number.

21301211112 is an abundant number, since it is smaller than the sum of its proper divisors (31951816728).

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

21301211112 is a wasteful number, since it uses less digits than its factorization.

21301211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887550472 (or 887550468 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21301211112 its reverse (21111210312), we get a palindrome (42412421424).

The spelling of 21301211112 in words is "twenty-one billion, three hundred one million, two hundred eleven thousand, one hundred twelve".