210111210020 has 24 divisors (see below), whose sum is σ = 445281559800. Its totient is φ = 83273432832.

The previous prime is 210111210013. The next prime is 210111210103. The reversal of 210111210020 is 20012111012.

It can be written as a sum of positive squares in 4 ways, for example, as 41661708544 + 168449501476 = 204112^2 + 410426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210111209983 and 210111210010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48188465 + ... + 48192824.

It is an arithmetic number, because the mean of its divisors is an integer number (18553398325).

Almost surely, 2^210111210020 is an apocalyptic number.

210111210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210111210020 is an abundant number, since it is smaller than the sum of its proper divisors (235170349780).

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

210111210020 is a wasteful number, since it uses less digits than its factorization.

210111210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96381407 (or 96381405 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210111210020 its reverse (20012111012), we get a palindrome (230123321032).

The spelling of 210111210020 in words is "two hundred ten billion, one hundred eleven million, two hundred ten thousand, twenty".