21097705412822 has 8 divisors (see below), whose sum is σ = 31659522714072. Its totient is φ = 10544531174800.

The previous prime is 21097705412761. The next prime is 21097705412827. The reversal of 21097705412822 is 22821450779012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21097705412822² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21097705412827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160759704 + ... + 2160769467.

It is an arithmetic number, because the mean of its divisors is an integer number (3957440339259).

Almost surely, 2^{21097705412822} is an apocalyptic number.

21097705412822 is a deficient number, since it is larger than the sum of its proper divisors (10561817301250).

21097705412822 is a wasteful number, since it uses less digits than its factorization.

21097705412822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321531614.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 21097705412822 in words is "twenty-one trillion, ninety-seven billion, seven hundred five million, four hundred twelve thousand, eight hundred twenty-two".