110021031954521 has 2 divisors, whose sum is σ = 110021031954522. Its totient is φ = 110021031954520.

The previous prime is 110021031954487. The next prime is 110021031954527. The reversal of 110021031954521 is 125459130120011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70162820505625 + 39858211448896 = 8376325^2 + 6313336^2 .

It is an emirp because it is prime and its reverse (125459130120011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110021031954521 is a prime.

It is not a weakly prime, because it can be changed into another prime (110021031954527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010515977260 + 55010515977261.

It is an arithmetic number, because the mean of its divisors is an integer number (55010515977261).

Almost surely, 2^{110021031954521} is an apocalyptic number.

It is an amenable number.

110021031954521 is a deficient number, since it is larger than the sum of its proper divisors (1).

110021031954521 is an equidigital number, since it uses as much as digits as its factorization.

110021031954521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 110021031954521 in words is "one hundred ten trillion, twenty-one billion, thirty-one million, nine hundred fifty-four thousand, five hundred twenty-one".