21122830969 has 4 divisors (see below), whose sum is σ = 21123275380. Its totient is φ = 21122386560.

The previous prime is 21122830943. The next prime is 21122831003. The reversal of 21122830969 is 96903822112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 325441600 + 20797389369 = 18040^2 + 144213^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122830969 - 2²³ = 21114442361 is a prime.

It is a super-2 number, since 2×21122830969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122830909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141024 + ... + 249265.

It is an arithmetic number, because the mean of its divisors is an integer number (5280818845).

Almost surely, 2^21122830969 is an apocalyptic number.

It is an amenable number.

21122830969 is a deficient number, since it is larger than the sum of its proper divisors (444411).

21122830969 is an equidigital number, since it uses as much as digits as its factorization.

21122830969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444410.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 21122830969 in words is "twenty-one billion, one hundred twenty-two million, eight hundred thirty thousand, nine hundred sixty-nine".