21320311122131 has 8 divisors (see below), whose sum is σ = 24515554946304. Its totient is φ = 18162438571080.

The previous prime is 21320311122127. The next prime is 21320311122139. The reversal of 21320311122131 is 13122111302312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320311122131 - 2² = 21320311122127 is a prime.

It is a super-2 number, since 2×21320311122131² (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 = 21320311122097 and 21320311122106.

It is not an unprimeable number, because it can be changed into a prime (21320311122139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9342817055 + ... + 9342819336.

It is an arithmetic number, because the mean of its divisors is an integer number (3064444368288).

Almost surely, 2^{21320311122131} is an apocalyptic number.

21320311122131 is a deficient number, since it is larger than the sum of its proper divisors (3195243824173).

21320311122131 is a wasteful number, since it uses less digits than its factorization.

21320311122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18685636561.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21320311122131 its reverse (13122111302312), we get a palindrome (34442422424443).

The spelling of 21320311122131 in words is "twenty-one trillion, three hundred twenty billion, three hundred eleven million, one hundred twenty-two thousand, one hundred thirty-one".