21122001136 has 10 divisors (see below), whose sum is σ = 40923877232. Its totient is φ = 10561000560.

The previous prime is 21122001071. The next prime is 21122001139. The reversal of 21122001136 is 63110022112.

It is a super-2 number, since 2×21122001136² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122001139) 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 as a sum of consecutive naturals, namely, 660062520 + ... + 660062551.

Almost surely, 2^21122001136 is an apocalyptic number.

It is an amenable number.

21122001136 is a deficient number, since it is larger than the sum of its proper divisors (19801876096).

21122001136 is a wasteful number, since it uses less digits than its factorization.

21122001136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320125079 (or 1320125073 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21122001136 its reverse (63110022112), we get a palindrome (84232023248).

The spelling of 21122001136 in words is "twenty-one billion, one hundred twenty-two million, one thousand, one hundred thirty-six".