20310321001381 has 2 divisors, whose sum is σ = 20310321001382. Its totient is φ = 20310321001380.

The previous prime is 20310321001339. The next prime is 20310321001387. The reversal of 20310321001381 is 18310012301302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19146006628225 + 1164314373156 = 4375615^2 + 1079034^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310321001381 - 2⁴³ = 11514227979173 is a prime.

It is a super-2 number, since 2×20310321001381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310321001387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155160500690 + 10155160500691.

It is an arithmetic number, because the mean of its divisors is an integer number (10155160500691).

Almost surely, 2^{20310321001381} is an apocalyptic number.

It is an amenable number.

20310321001381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310321001381 is an equidigital number, since it uses as much as digits as its factorization.

20310321001381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 20310321001381 its reverse (18310012301302), we get a palindrome (38620333302683).

The spelling of 20310321001381 in words is "twenty trillion, three hundred ten billion, three hundred twenty-one million, one thousand, three hundred eighty-one".