21122001132 has 24 divisors (see below), whose sum is σ = 49720820016. Its totient is φ = 6978359808.

The previous prime is 21122001071. The next prime is 21122001139. The reversal of 21122001132 is 23110022112.

It is a super-2 number, since 2×21122001132² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122001139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7786993 + ... + 7789704.

It is an arithmetic number, because the mean of its divisors is an integer number (2071700834).

Almost surely, 2^21122001132 is an apocalyptic number.

It is an amenable number.

21122001132 is an abundant number, since it is smaller than the sum of its proper divisors (28598818884).

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

21122001132 is a wasteful number, since it uses less digits than its factorization.

21122001132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15576817 (or 15576815 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21122001132 its reverse (23110022112), we get a palindrome (44232023244).

The spelling of 21122001132 in words is "twenty-one billion, one hundred twenty-two million, one thousand, one hundred thirty-two".