202120221100 has 72 divisors (see below), whose sum is σ = 523052022528. Its totient is φ = 66285384000.

The previous prime is 202120221091. The next prime is 202120221109. The reversal of 202120221100 is 1122021202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (202120221091) and next prime (202120221109).

It is not an unprimeable number, because it can be changed into a prime (202120221109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6260926 + ... + 6293125.

It is an arithmetic number, because the mean of its divisors is an integer number (7264611424).

Almost surely, 2^202120221100 is an apocalyptic number.

202120221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120221100 is an abundant number, since it is smaller than the sum of its proper divisors (320931801428).

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

202120221100 is a wasteful number, since it uses less digits than its factorization.

202120221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554095 (or 12554088 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202120221100 its reverse (1122021202), we get a palindrome (203242242302).

The spelling of 202120221100 in words is "two hundred two billion, one hundred twenty million, two hundred twenty-one thousand, one hundred".