21151224351014 has 4 divisors (see below), whose sum is σ = 31726836526524. Its totient is φ = 10575612175506.

The previous prime is 21151224351011. The next prime is 21151224351077. The reversal of 21151224351014 is 41015342215112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21151224351011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5287806087752 + ... + 5287806087755.

It is an arithmetic number, because the mean of its divisors is an integer number (7931709131631).

Almost surely, 2^{21151224351014} is an apocalyptic number.

21151224351014 is a deficient number, since it is larger than the sum of its proper divisors (10575612175510).

21151224351014 is a wasteful number, since it uses less digits than its factorization.

21151224351014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10575612175509.

The product of its (nonzero) digits is 9600, while the sum is 32.

Adding to 21151224351014 its reverse (41015342215112), we get a palindrome (62166566566126).

The spelling of 21151224351014 in words is "twenty-one trillion, one hundred fifty-one billion, two hundred twenty-four million, three hundred fifty-one thousand, fourteen".