21110021000196 has 144 divisors (see below), whose sum is σ = 53823184887360. Its totient is φ = 6435692513280.

The previous prime is 21110021000149. The next prime is 21110021000209. The reversal of 21110021000196 is 69100012001112.

It is a happy number.

It is a super-2 number, since 2×21110021000196² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16957350 + ... + 18159618.

Almost surely, 2^{21110021000196} 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 21110021000196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26911592443680).

21110021000196 is an abundant number, since it is smaller than the sum of its proper divisors (32713163887164).

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

21110021000196 is a wasteful number, since it uses less digits than its factorization.

21110021000196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202454 (or 1202435 counting only the distinct ones).

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

The spelling of 21110021000196 in words is "twenty-one trillion, one hundred ten billion, twenty-one million, one hundred ninety-six", and thus it is an aban number.