21122110202 has 8 divisors (see below), whose sum is σ = 31699733076. Its totient is φ = 10555532512.

The previous prime is 21122110199. The next prime is 21122110277. The reversal of 21122110202 is 20201122112.

It can be written as a sum of positive squares in 2 ways, for example, as 20554670161 + 567440041 = 143369^2 + 23821^2 .

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

It is a super-2 number, since 2×21122110202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2756513 + ... + 2764164.

Almost surely, 2^21122110202 is an apocalyptic number.

21122110202 is a deficient number, since it is larger than the sum of its proper divisors (10577622874).

21122110202 is a wasteful number, since it uses less digits than its factorization.

21122110202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522592.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21122110202 its reverse (20201122112), we get a palindrome (41323232314).

The spelling of 21122110202 in words is "twenty-one billion, one hundred twenty-two million, one hundred ten thousand, two hundred two".