21122133186 has 32 divisors (see below), whose sum is σ = 52668177408. Its totient is φ = 5486268240.

The previous prime is 21122133181. The next prime is 21122133187. The reversal of 21122133186 is 68133122112.

It is a super-2 number, since 2×21122133186² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122133181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22858990 + ... + 22859913.

It is an arithmetic number, because the mean of its divisors is an integer number (1645880544).

Almost surely, 2^21122133186 is an apocalyptic number.

21122133186 is an abundant number, since it is smaller than the sum of its proper divisors (31546044222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122133186 is a wasteful number, since it uses less digits than its factorization.

21122133186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45718926.

The product of its digits is 3456, while the sum is 30.

Adding to 21122133186 its reverse (68133122112), we get a palindrome (89255255298).

The spelling of 21122133186 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirty-three thousand, one hundred eighty-six".