2011212100 has 36 divisors (see below), whose sum is σ = 4366408900. Its totient is φ = 804101760.

The previous prime is 2011212067. The next prime is 2011212107. The reversal of 2011212100 is 12121102.

It can be written as a sum of positive squares in 6 ways, for example, as 632723716 + 1378488384 = 25154^2 + 37128^2 .

It is a super-2 number, since 2×2011212100² = 8089948222372820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2011212107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307666 + ... + 314134.

Almost surely, 2^2011212100 is an apocalyptic number.

2011212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011212100 is an abundant number, since it is smaller than the sum of its proper divisors (2355196800).

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

2011212100 is a wasteful number, since it uses less digits than its factorization.

2011212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592 (or 9585 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2011212100 is about 44846.5394428600. The cubic root of 2011212100 is about 1262.2710573978.

Adding to 2011212100 its reverse (12121102), we get a palindrome (2023333202).

The spelling of 2011212100 in words is "two billion, eleven million, two hundred twelve thousand, one hundred".