100312211123 has 2 divisors, whose sum is σ = 100312211124. Its totient is φ = 100312211122.

The previous prime is 100312211071. The next prime is 100312211143. The reversal of 100312211123 is 321112213001.

It is a strong prime.

It is an emirp because it is prime and its reverse (321112213001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100312211123 - 2¹² = 100312207027 is a prime.

It is a super-2 number, since 2×100312211123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100312211143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50156105561 + 50156105562.

It is an arithmetic number, because the mean of its divisors is an integer number (50156105562).

Almost surely, 2^100312211123 is an apocalyptic number.

100312211123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100312211123 is an equidigital number, since it uses as much as digits as its factorization.

100312211123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 100312211123 its reverse (321112213001), we get a palindrome (421424424124).

The spelling of 100312211123 in words is "one hundred billion, three hundred twelve million, two hundred eleven thousand, one hundred twenty-three".