21010333221097 has 4 divisors (see below), whose sum is σ = 22920363513936. Its totient is φ = 19100302928260.

The previous prime is 21010333221079. The next prime is 21010333221161. The reversal of 21010333221097 is 79012233301012.

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 21010333221097 - 2¹⁵ = 21010333188329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010333251097) 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, 955015146403 + ... + 955015146424.

It is an arithmetic number, because the mean of its divisors is an integer number (5730090878484).

Almost surely, 2^{21010333221097} is an apocalyptic number.

It is an amenable number.

21010333221097 is a deficient number, since it is larger than the sum of its proper divisors (1910030292839).

21010333221097 is a wasteful number, since it uses less digits than its factorization.

21010333221097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910030292838.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 21010333221097 in words is "twenty-one trillion, ten billion, three hundred thirty-three million, two hundred twenty-one thousand, ninety-seven".