21214134312131 has 4 divisors (see below), whose sum is σ = 22330667697000. Its totient is φ = 20097600927264.

The previous prime is 21214134312113. The next prime is 21214134312211. The reversal of 21214134312131 is 13121343141212.

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

It is a de Polignac number, because none of the positive numbers 2^k-21214134312131 is a prime.

It is a super-2 number, since 2×21214134312131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214134312094 and 21214134312103.

It is not an unprimeable number, because it can be changed into a prime (21214134311131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558266692406 + ... + 558266692443.

It is an arithmetic number, because the mean of its divisors is an integer number (5582666924250).

Almost surely, 2^{21214134312131} is an apocalyptic number.

21214134312131 is a deficient number, since it is larger than the sum of its proper divisors (1116533384869).

21214134312131 is a wasteful number, since it uses less digits than its factorization.

21214134312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116533384868.

The product of its digits is 3456, while the sum is 29.

Adding to 21214134312131 its reverse (13121343141212), we get a palindrome (34335477453343).

The spelling of 21214134312131 in words is "twenty-one trillion, two hundred fourteen billion, one hundred thirty-four million, three hundred twelve thousand, one hundred thirty-one".