212003221100 has 288 divisors, whose sum is σ = 529781091840. Its totient is φ = 72930816000.

The previous prime is 212003221091. The next prime is 212003221109. The reversal of 212003221100 is 1122300212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212003221091) and next prime (212003221109).

It is not an unprimeable number, because it can be changed into a prime (212003221109) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 371283815 + ... + 371284385.

It is an arithmetic number, because the mean of its divisors is an integer number (1839517680).

Almost surely, 2^212003221100 is an apocalyptic number.

212003221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212003221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264890545920).

212003221100 is an abundant number, since it is smaller than the sum of its proper divisors (317777870740).

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

212003221100 is a wasteful number, since it uses less digits than its factorization.

212003221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 834 counting only the distinct ones).

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

Adding to 212003221100 its reverse (1122300212), we get a palindrome (213125521312).

The spelling of 212003221100 in words is "two hundred twelve billion, three million, two hundred twenty-one thousand, one hundred".