210111100121100 has 72 divisors (see below), whose sum is σ = 609139729576000. Its totient is φ = 55917342838080.

The previous prime is 210111100121089. The next prime is 210111100121173. The reversal of 210111100121100 is 1121001111012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 701624182 + ... + 701923581.

Almost surely, 2^{210111100121100} is an apocalyptic number.

210111100121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210111100121100 is an abundant number, since it is smaller than the sum of its proper divisors (399028629454900).

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

210111100121100 is a wasteful number, since it uses less digits than its factorization.

210111100121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403548279 (or 1403548272 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 210111100121100 its reverse (1121001111012), we get a palindrome (211232101232112).

The spelling of 210111100121100 in words is "two hundred ten trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand, one hundred".