21231303003131 has 8 divisors (see below), whose sum is σ = 23074246031760. Its totient is φ = 19418326528032.

The previous prime is 21231303003089. The next prime is 21231303003151. The reversal of 21231303003131 is 13130030313212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21231303003131 is a prime.

It is a super-2 number, since 2×21231303003131² (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 = 21231303003097 and 21231303003106.

It is not an unprimeable number, because it can be changed into a prime (21231303003151) 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, 7491636905 + ... + 7491639738.

It is an arithmetic number, because the mean of its divisors is an integer number (2884280753970).

Almost surely, 2^{21231303003131} is an apocalyptic number.

21231303003131 is a deficient number, since it is larger than the sum of its proper divisors (1842943028629).

21231303003131 is a wasteful number, since it uses less digits than its factorization.

21231303003131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14983276765.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21231303003131 its reverse (13130030313212), we get a palindrome (34361333316343).

The spelling of 21231303003131 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred three million, three thousand, one hundred thirty-one".