21022710191442 has 24 divisors (see below), whose sum is σ = 45657398318220. Its totient is φ = 6990925001760.

The previous prime is 21022710191389. The next prime is 21022710191443. The reversal of 21022710191442 is 24419101722012.

21022710191442 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 27 + 1 + 0 + 191 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20356330216401 + 666379975041 = 4511799^2 + 816321^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21022710191397 and 21022710191406.

It is not an unprimeable number, because it can be changed into a prime (21022710191443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1387080717 + ... + 1387095872.

Almost surely, 2^{21022710191442} is an apocalyptic number.

21022710191442 is an abundant number, since it is smaller than the sum of its proper divisors (24634688126778).

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

21022710191442 is a wasteful number, since it uses less digits than its factorization.

21022710191442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774177018 (or 2774177015 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 21022710191442 in words is "twenty-one trillion, twenty-two billion, seven hundred ten million, one hundred ninety-one thousand, four hundred forty-two".