211010110000020 has 144 divisors (see below), whose sum is σ = 668165905051008. Its totient is φ = 55896717686400.

The previous prime is 211010110000009. The next prime is 211010110000043. The reversal of 211010110000020 is 20000011010112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 211010109999957 and 211010110000011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 143033419 + ... + 144501138.

Almost surely, 2^{211010110000020} is an apocalyptic number.

211010110000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211010110000020 is an abundant number, since it is smaller than the sum of its proper divisors (457155795050988).

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

211010110000020 is a wasteful number, since it uses less digits than its factorization.

211010110000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287534732 (or 287534718 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 211010110000020 its reverse (20000011010112), we get a palindrome (231010121010132).

The spelling of 211010110000020 in words is "two hundred eleven trillion, ten billion, one hundred ten million, twenty", and thus it is an aban number.