211210100028 has 36 divisors (see below), whose sum is σ = 536183601408. Its totient is φ = 70101203520.

The previous prime is 211210099979. The next prime is 211210100029. The reversal of 211210100028 is 820001012112.

211210100028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210100029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12581628 + ... + 12598403.

It is an arithmetic number, because the mean of its divisors is an integer number (14893988928).

Almost surely, 2^211210100028 is an apocalyptic number.

It is an amenable number.

211210100028 is an abundant number, since it is smaller than the sum of its proper divisors (324973501380).

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

211210100028 is a wasteful number, since it uses less digits than its factorization.

211210100028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25180274 (or 25180269 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The spelling of 211210100028 in words is "two hundred eleven billion, two hundred ten million, one hundred thousand, twenty-eight".