21121320014 has 4 divisors (see below), whose sum is σ = 31681980024. Its totient is φ = 10560660006.

The previous prime is 21121320001. The next prime is 21121320071. The reversal of 21121320014 is 41002312112.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21121320014² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121319974 and 21121320001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280330002 + ... + 5280330005.

It is an arithmetic number, because the mean of its divisors is an integer number (7920495006).

Almost surely, 2^21121320014 is an apocalyptic number.

21121320014 is a deficient number, since it is larger than the sum of its proper divisors (10560660010).

21121320014 is a wasteful number, since it uses less digits than its factorization.

21121320014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560660009.

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

Adding to 21121320014 its reverse (41002312112), we get a palindrome (62123632126).

The spelling of 21121320014 in words is "twenty-one billion, one hundred twenty-one million, three hundred twenty thousand, fourteen".