21325131313031 has 8 divisors (see below), whose sum is σ = 26246315462304. Its totient is φ = 16872631368480.

The previous prime is 21325131313019. The next prime is 21325131313033. The reversal of 21325131313031 is 13031313152312.

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 21325131313031 - 2¹⁰ = 21325131312007 is a prime.

It is a super-2 number, since 2×21325131313031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21325131312985 and 21325131313003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325131313033) 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, 117171051080 + ... + 117171051261.

It is an arithmetic number, because the mean of its divisors is an integer number (3280789432788).

Almost surely, 2^{21325131313031} is an apocalyptic number.

21325131313031 is a deficient number, since it is larger than the sum of its proper divisors (4921184149273).

21325131313031 is a wasteful number, since it uses less digits than its factorization.

21325131313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234342102361.

The product of its (nonzero) digits is 4860, while the sum is 29.

Adding to 21325131313031 its reverse (13031313152312), we get a palindrome (34356444465343).

The spelling of 21325131313031 in words is "twenty-one trillion, three hundred twenty-five billion, one hundred thirty-one million, three hundred thirteen thousand, thirty-one".