21312214011 has 12 divisors (see below), whose sum is σ = 33582882840. Its totient is φ = 12916493280.

The previous prime is 21312213959. The next prime is 21312214037. The reversal of 21312214011 is 11041221312.

It is not a de Polignac number, because 21312214011 - 2⁹ = 21312213499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312234011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107637346 + ... + 107637543.

It is an arithmetic number, because the mean of its divisors is an integer number (2798573570).

Almost surely, 2^21312214011 is an apocalyptic number.

21312214011 is a deficient number, since it is larger than the sum of its proper divisors (12270668829).

21312214011 is a wasteful number, since it uses less digits than its factorization.

21312214011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215274906 (or 215274903 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21312214011 its reverse (11041221312), we get a palindrome (32353435323).

The spelling of 21312214011 in words is "twenty-one billion, three hundred twelve million, two hundred fourteen thousand, eleven".