21151201411344 has 40 divisors (see below), whose sum is σ = 54641480176800. Its totient is φ = 7050287369728.

The previous prime is 21151201411337. The next prime is 21151201411349. The reversal of 21151201411344 is 44311410215112.

It is a super-2 number, since 2×21151201411344² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21151201411349) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 483894 + ... + 6522005.

It is an arithmetic number, because the mean of its divisors is an integer number (1366037004420).

Almost surely, 2^{21151201411344} is an apocalyptic number.

21151201411344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21151201411344 is an abundant number, since it is smaller than the sum of its proper divisors (33490278765456).

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

21151201411344 is a wasteful number, since it uses less digits than its factorization.

21151201411344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068807 (or 7068801 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 21151201411344 its reverse (44311410215112), we get a palindrome (65462611626456).

The spelling of 21151201411344 in words is "twenty-one trillion, one hundred fifty-one billion, two hundred one million, four hundred eleven thousand, three hundred forty-four".