100212021012 has 24 divisors (see below), whose sum is σ = 233837732800. Its totient is φ = 33402623616.

The previous prime is 100212020983. The next prime is 100212021017. The reversal of 100212021012 is 210120212001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153564 + ... + 473292.

Almost surely, 2^100212021012 is an apocalyptic number.

100212021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100212021012 is an abundant number, since it is smaller than the sum of its proper divisors (133625711788).

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

100212021012 is a wasteful number, since it uses less digits than its factorization.

100212021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345855 (or 345853 counting only the distinct ones).

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

Adding to 100212021012 its reverse (210120212001), we get a palindrome (310332233013).

The spelling of 100212021012 in words is "one hundred billion, two hundred twelve million, twenty-one thousand, twelve".