212122010100 has 1152 divisors, whose sum is σ = 896894595072. Its totient is φ = 37225267200.

The previous prime is 212122010039. The next prime is 212122010167. The reversal of 212122010100 is 1010221212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 188888139 + ... + 188889261.

It is an arithmetic number, because the mean of its divisors is an integer number (778554336).

Almost surely, 2^212122010100 is an apocalyptic number.

212122010100 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 212122010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448447297536).

212122010100 is an abundant number, since it is smaller than the sum of its proper divisors (684772584972).

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

212122010100 is a wasteful number, since it uses less digits than its factorization.

212122010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212122010100 its reverse (1010221212), we get a palindrome (213132231312).

The spelling of 212122010100 in words is "two hundred twelve billion, one hundred twenty-two million, ten thousand, one hundred".