100011110123021 has 2 divisors, whose sum is σ = 100011110123022. Its totient is φ = 100011110123020.

The previous prime is 100011110123003. The next prime is 100011110123027. The reversal of 100011110123021 is 120321011110001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92007806884900 + 8003303238121 = 9592070^2 + 2829011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100011110123021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100011110122987 and 100011110123005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100011110123027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005555061510 + 50005555061511.

It is an arithmetic number, because the mean of its divisors is an integer number (50005555061511).

Almost surely, 2^{100011110123021} is an apocalyptic number.

It is an amenable number.

100011110123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100011110123021 is an equidigital number, since it uses as much as digits as its factorization.

100011110123021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 100011110123021 its reverse (120321011110001), we get a palindrome (220332121233022).

The spelling of 100011110123021 in words is "one hundred trillion, eleven billion, one hundred ten million, one hundred twenty-three thousand, twenty-one".