211101000020 has 24 divisors (see below), whose sum is σ = 443339586144. Its totient is φ = 84435164576.

The previous prime is 211101000001. The next prime is 211101000023. The reversal of 211101000020 is 20000101112.

It is a junction number, because it is equal to n+sod(n) for n = 211100999971 and 211101000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101000023) 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, 11999 + ... + 649881.

It is an arithmetic number, because the mean of its divisors is an integer number (18472482756).

Almost surely, 2^211101000020 is an apocalyptic number.

211101000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101000020 is an abundant number, since it is smaller than the sum of its proper divisors (232238586124).

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

211101000020 is a wasteful number, since it uses less digits than its factorization.

211101000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654439 (or 654437 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 211101000020 its reverse (20000101112), we get a palindrome (231101101132).

The spelling of 211101000020 in words is "two hundred eleven billion, one hundred one million, twenty", and thus it is an aban number.