21311152314152 has 8 divisors (see below), whose sum is σ = 39958410589050. Its totient is φ = 10655576157072.

The previous prime is 21311152314143. The next prime is 21311152314211. The reversal of 21311152314152 is 25141325111312.

21311152314152 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 20601740299396 + 709412014756 = 4538914^2 + 842266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21311152314152² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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, 1331947019627 + ... + 1331947019642.

Almost surely, 2^{21311152314152} is an apocalyptic number.

It is an amenable number.

21311152314152 is a deficient number, since it is larger than the sum of its proper divisors (18647258274898).

21311152314152 is a wasteful number, since it uses less digits than its factorization.

21311152314152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663894039275 (or 2663894039271 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

Adding to 21311152314152 its reverse (25141325111312), we get a palindrome (46452477425464).

The spelling of 21311152314152 in words is "twenty-one trillion, three hundred eleven billion, one hundred fifty-two million, three hundred fourteen thousand, one hundred fifty-two".