2231212100 has 36 divisors (see below), whose sum is σ = 5214174084. Its totient is φ = 823831680.

The previous prime is 2231212097. The next prime is 2231212163. The reversal of 2231212100 is 12121322.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 8655364 + 2222556736 = 2942^2 + 47144^2 .

It is a super-3 number, since 3×2231212100³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856859 + ... + 859458.

It is an arithmetic number, because the mean of its divisors is an integer number (144838169).

Almost surely, 2^2231212100 is an apocalyptic number.

2231212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231212100 is an abundant number, since it is smaller than the sum of its proper divisors (2982961984).

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

2231212100 is a wasteful number, since it uses less digits than its factorization.

2231212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716344 (or 1716337 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2231212100 is about 47235.7078913823. The cubic root of 2231212100 is about 1306.7132218535.

Adding to 2231212100 its reverse (12121322), we get a palindrome (2243333422).

The spelling of 2231212100 in words is "two billion, two hundred thirty-one million, two hundred twelve thousand, one hundred".