212120012122100 has 72 divisors (see below), whose sum is σ = 483089867769600. Its totient is φ = 80689834065280.

The previous prime is 212120012122097. The next prime is 212120012122129. The reversal of 212120012122100 is 1221210021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266151500 + ... + 266947299.

It is an arithmetic number, because the mean of its divisors is an integer number (6709581496800).

Almost surely, 2^{212120012122100} is an apocalyptic number.

212120012122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120012122100 is an abundant number, since it is smaller than the sum of its proper divisors (270969855647500).

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

212120012122100 is a wasteful number, since it uses less digits than its factorization.

212120012122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533099009 (or 533099002 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212120012122100 its reverse (1221210021212), we get a palindrome (213341222143312).

The spelling of 212120012122100 in words is "two hundred twelve trillion, one hundred twenty billion, twelve million, one hundred twenty-two thousand, one hundred".