211031000100 has 54 divisors (see below), whose sum is σ = 661464948690. Its totient is φ = 56274933120.

The previous prime is 211031000087. The next prime is 211031000177. The reversal of 211031000100 is 1000130112.

It can be written as a sum of positive squares in 3 ways, for example, as 48480113124 + 162550886976 = 220182^2 + 403176^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 117238545 + ... + 117240344.

Almost surely, 2^211031000100 is an apocalyptic number.

211031000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211031000100 is an abundant number, since it is smaller than the sum of its proper divisors (450433948590).

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

211031000100 is a wasteful number, since it uses less digits than its factorization.

211031000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234478909 (or 234478899 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 211031000100 its reverse (1000130112), we get a palindrome (212031130212).

The spelling of 211031000100 in words is "two hundred eleven billion, thirty-one million, one hundred", and thus it is an aban number.