20021100221332 has 36 divisors (see below), whose sum is σ = 40758642318240. Its totient is φ = 8580176243184.

The previous prime is 20021100221293. The next prime is 20021100221333. The reversal of 20021100221332 is 23312200112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021100221333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4000419 + ... + 7486357.

It is an arithmetic number, because the mean of its divisors is an integer number (1132184508840).

Almost surely, 2^{20021100221332} is an apocalyptic number.

It is an amenable number.

20021100221332 is an abundant number, since it is smaller than the sum of its proper divisors (20737542096908).

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

20021100221332 is a wasteful number, since it uses less digits than its factorization.

20021100221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515260 (or 3515251 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20021100221332 its reverse (23312200112002), we get a palindrome (43333300333334).

The spelling of 20021100221332 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred twenty-one thousand, three hundred thirty-two".