21122160266 has 8 divisors (see below), whose sum is σ = 32775766020. Its totient is φ = 10196904928.

The previous prime is 21122160211. The next prime is 21122160277. The reversal of 21122160266 is 66206122112.

It can be written as a sum of positive squares in 2 ways, for example, as 21074619241 + 47541025 = 145171^2 + 6895^2 .

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

It is a super-2 number, since 2×21122160266² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 182087531 + ... + 182087646.

Almost surely, 2^21122160266 is an apocalyptic number.

21122160266 is a deficient number, since it is larger than the sum of its proper divisors (11653605754).

21122160266 is a wasteful number, since it uses less digits than its factorization.

21122160266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364175208.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 21122160266 its reverse (66206122112), we get a palindrome (87328282378).

The spelling of 21122160266 in words is "twenty-one billion, one hundred twenty-two million, one hundred sixty thousand, two hundred sixty-six".