21102012000197 has 8 divisors (see below), whose sum is σ = 22888265527512. Its totient is φ = 19376309440000.

The previous prime is 21102012000137. The next prime is 21102012000229. The reversal of 21102012000197 is 79100021020112.

It can be written as a sum of positive squares in 4 ways, for example, as 5362749009121 + 15739262991076 = 2315761^2 + 3967274^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21102012000197 - 2⁸ = 21102011999941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102012000137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15137741054 + ... + 15137742447.

It is an arithmetic number, because the mean of its divisors is an integer number (2861033190939).

Almost surely, 2^{21102012000197} is an apocalyptic number.

It is an amenable number.

21102012000197 is a deficient number, since it is larger than the sum of its proper divisors (1786253527315).

21102012000197 is a wasteful number, since it uses less digits than its factorization.

21102012000197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30275483559.

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

The spelling of 21102012000197 in words is "twenty-one trillion, one hundred two billion, twelve million, one hundred ninety-seven", and thus it is an aban number.