21210122210193 has 64 divisors (see below), whose sum is σ = 36750479800320. Its totient is φ = 11836914336576.

The previous prime is 21210122210171. The next prime is 21210122210281. The reversal of 21210122210193 is 39101222101212.

It is not a de Polignac number, because 21210122210193 - 2¹⁶ = 21210122144657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21210122210093) 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 63 ways as a sum of consecutive naturals, for example, 76800471 + ... + 77076147.

It is an arithmetic number, because the mean of its divisors is an integer number (574226246880).

Almost surely, 2^{21210122210193} is an apocalyptic number.

It is an amenable number.

21210122210193 is a deficient number, since it is larger than the sum of its proper divisors (15540357590127).

21210122210193 is a wasteful number, since it uses less digits than its factorization.

21210122210193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285203 (or 285197 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 21210122210193 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-two million, two hundred ten thousand, one hundred ninety-three".