210220021100 has 54 divisors (see below), whose sum is σ = 467033350140. Its totient is φ = 82132401120.

The previous prime is 210220021087. The next prime is 210220021127. The reversal of 210220021100 is 1120022012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 383570 + ... + 753369.

Almost surely, 2^210220021100 is an apocalyptic number.

210220021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210220021100 is an abundant number, since it is smaller than the sum of its proper divisors (256813329040).

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

210220021100 is a wasteful number, since it uses less digits than its factorization.

210220021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137039 (or 1136989 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210220021100 its reverse (1120022012), we get a palindrome (211340043112).

The spelling of 210220021100 in words is "two hundred ten billion, two hundred twenty million, twenty-one thousand, one hundred".