20113221132 has 60 divisors (see below), whose sum is σ = 52692920280. Its totient is φ = 6690000384.

The previous prime is 20113221131. The next prime is 20113221209. The reversal of 20113221132 is 23112231102.

It is a super-2 number, since 2×20113221132² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20113221131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84844 + ... + 217772.

It is an arithmetic number, because the mean of its divisors is an integer number (878215338).

Almost surely, 2^20113221132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113221132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26346460140).

20113221132 is an abundant number, since it is smaller than the sum of its proper divisors (32579699148).

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

20113221132 is a wasteful number, since it uses less digits than its factorization.

20113221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133412 (or 133401 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20113221132 its reverse (23112231102), we get a palindrome (43225452234).

The spelling of 20113221132 in words is "twenty billion, one hundred thirteen million, two hundred twenty-one thousand, one hundred thirty-two".