21010012012097 has 4 divisors (see below), whose sum is σ = 21010288002096. Its totient is φ = 21009736022100.

The previous prime is 21010012012091. The next prime is 21010012012117. The reversal of 21010012012097 is 79021021001012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21010012012097 - 2¹⁰ = 21010012011073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010012012091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137880779 + ... + 138033072.

It is an arithmetic number, because the mean of its divisors is an integer number (5252572000524).

Almost surely, 2^{21010012012097} is an apocalyptic number.

It is an amenable number.

21010012012097 is a deficient number, since it is larger than the sum of its proper divisors (275989999).

21010012012097 is an equidigital number, since it uses as much as digits as its factorization.

21010012012097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275989998.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 21010012012097 in words is "twenty-one trillion, ten billion, twelve million, twelve thousand, ninety-seven".