21131131010313 has 8 divisors (see below), whose sum is σ = 29832184955808. Its totient is φ = 13258748869184.

The previous prime is 21131131010309. The next prime is 21131131010321. The reversal of 21131131010313 is 31301013113112.

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 21131131010313 - 2² = 21131131010309 is a prime.

It is a super-2 number, since 2×21131131010313² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21131131010313.

It is not an unprimeable number, because it can be changed into a prime (21131131010413) 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, 207167951031 + ... + 207167951132.

It is an arithmetic number, because the mean of its divisors is an integer number (3729023119476).

Almost surely, 2^{21131131010313} is an apocalyptic number.

It is an amenable number.

21131131010313 is a deficient number, since it is larger than the sum of its proper divisors (8701053945495).

21131131010313 is a wasteful number, since it uses less digits than its factorization.

21131131010313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414335902183.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 21131131010313 its reverse (31301013113112), we get a palindrome (52432144123425).

The spelling of 21131131010313 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred thirty-one million, ten thousand, three hundred thirteen".