21999964611192 has 128 divisors (see below), whose sum is σ = 56682561922560. Its totient is φ = 7111199047680.

The previous prime is 21999964611077. The next prime is 21999964611227. The reversal of 21999964611192 is 29111646999912.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220817853 + ... + 220917459.

It is an arithmetic number, because the mean of its divisors is an integer number (442832515020).

Almost surely, 2^{21999964611192} 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 21999964611192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28341280961280).

21999964611192 is an abundant number, since it is smaller than the sum of its proper divisors (34682597311368).

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

21999964611192 is a wasteful number, since it uses less digits than its factorization.

21999964611192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101013 (or 101009 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 69.

The spelling of 21999964611192 in words is "twenty-one trillion, nine hundred ninety-nine billion, nine hundred sixty-four million, six hundred eleven thousand, one hundred ninety-two".