21120226737 has 8 divisors (see below), whose sum is σ = 28167356640. Its totient is φ = 14076624000.

The previous prime is 21120226723. The next prime is 21120226837. The reversal of 21120226737 is 73762202112.

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

It is not a de Polignac number, because 21120226737 - 2²⁰ = 21119178161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120226698 and 21120226707.

It is not an unprimeable number, because it can be changed into a prime (21120226717) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 867787 + ... + 891792.

It is an arithmetic number, because the mean of its divisors is an integer number (3520919580).

Almost surely, 2^21120226737 is an apocalyptic number.

It is an amenable number.

21120226737 is a deficient number, since it is larger than the sum of its proper divisors (7047129903).

21120226737 is a wasteful number, since it uses less digits than its factorization.

21120226737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763583.

The product of its (nonzero) digits is 14112, while the sum is 33.

Adding to 21120226737 its reverse (73762202112), we get a palindrome (94882428849).

The spelling of 21120226737 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-six thousand, seven hundred thirty-seven".