21010211196 has 24 divisors (see below), whose sum is σ = 52794890064. Its totient is φ = 6464680320.

The previous prime is 21010211177. The next prime is 21010211197. The reversal of 21010211196 is 69111201012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010211197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67340265 + ... + 67340576.

It is an arithmetic number, because the mean of its divisors is an integer number (2199787086).

Almost surely, 2^21010211196 is an apocalyptic number.

21010211196 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21010211196 is an abundant number, since it is smaller than the sum of its proper divisors (31784678868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010211196 is a wasteful number, since it uses less digits than its factorization.

21010211196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134680861 (or 134680859 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 24.

The spelling of 21010211196 in words is "twenty-one billion, ten million, two hundred eleven thousand, one hundred ninety-six".