210221112121100 has 36 divisors (see below), whose sum is σ = 462604881111408. Its totient is φ = 82904100552000.

The previous prime is 210221112121099. The next prime is 210221112121103. The reversal of 210221112121100 is 1121211122012.

It is not an unprimeable number, because it can be changed into a prime (210221112121103) 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, 14804296571 + ... + 14804310770.

It is an arithmetic number, because the mean of its divisors is an integer number (12850135586428).

Almost surely, 2^{210221112121100} is an apocalyptic number.

210221112121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221112121100 is an abundant number, since it is smaller than the sum of its proper divisors (252383768990308).

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

210221112121100 is a wasteful number, since it uses less digits than its factorization.

210221112121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29608607426 (or 29608607419 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210221112121100 its reverse (1121211122012), we get a palindrome (211342323243112).

The spelling of 210221112121100 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred".