100231123211993 has 2 divisors, whose sum is σ = 100231123211994. Its totient is φ = 100231123211992.

The previous prime is 100231123211929. The next prime is 100231123212079. The reversal of 100231123211993 is 399112321132001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98872854171289 + 1358269040704 = 9943483^2 + 1165448^2 .

It is a cyclic number.

It is not a de Polignac number, because 100231123211993 - 2⁶ = 100231123211929 is a prime.

It is a super-2 number, since 2×100231123211993² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100231123210993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50115561605996 + 50115561605997.

It is an arithmetic number, because the mean of its divisors is an integer number (50115561605997).

Almost surely, 2^{100231123211993} is an apocalyptic number.

It is an amenable number.

100231123211993 is a deficient number, since it is larger than the sum of its proper divisors (1).

100231123211993 is an equidigital number, since it uses as much as digits as its factorization.

100231123211993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

Adding to 100231123211993 its reverse (399112321132001), we get a palindrome (499343444343994).

The spelling of 100231123211993 in words is "one hundred trillion, two hundred thirty-one billion, one hundred twenty-three million, two hundred eleven thousand, nine hundred ninety-three".