21311101196 has 192 divisors, whose sum is σ = 51815199744. Its totient is φ = 7415193600.

The previous prime is 21311101183. The next prime is 21311101223. The reversal of 21311101196 is 69110111312.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7941671 + ... + 7944353.

It is an arithmetic number, because the mean of its divisors is an integer number (269870832).

Almost surely, 2^21311101196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21311101196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25907599872).

21311101196 is an abundant number, since it is smaller than the sum of its proper divisors (30504098548).

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

21311101196 is a wasteful number, since it uses less digits than its factorization.

21311101196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800 (or 2798 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 21311101196 in words is "twenty-one billion, three hundred eleven million, one hundred one thousand, one hundred ninety-six".