210210110021 has 8 divisors (see below), whose sum is σ = 216996384000. Its totient is φ = 203424167520.

The previous prime is 210210110017. The next prime is 210210110041. The reversal of 210210110021 is 120011012012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210210110021 - 2² = 210210110017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210210109984 and 210210110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210210110041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2238665 + ... + 2330673.

It is an arithmetic number, because the mean of its divisors is an integer number (27124548000).

Almost surely, 2^210210110021 is an apocalyptic number.

It is an amenable number.

210210110021 is a deficient number, since it is larger than the sum of its proper divisors (6786273979).

210210110021 is an equidigital number, since it uses as much as digits as its factorization.

210210110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165739.

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

Adding to 210210110021 its reverse (120011012012), we get a palindrome (330221122033).

The spelling of 210210110021 in words is "two hundred ten billion, two hundred ten million, one hundred ten thousand, twenty-one".