210100100121212 has 96 divisors (see below), whose sum is σ = 430117217402880. Its totient is φ = 87926732832960.

The previous prime is 210100100121077. The next prime is 210100100121217. The reversal of 210100100121212 is 212121001001012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100100121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1247074493 + ... + 1247242955.

It is an arithmetic number, because the mean of its divisors is an integer number (4480387681280).

Almost surely, 2^{210100100121212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210100100121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215058608701440).

210100100121212 is an abundant number, since it is smaller than the sum of its proper divisors (220017117281668).

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

210100100121212 is a wasteful number, since it uses less digits than its factorization.

210100100121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170671 (or 170669 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210100100121212 its reverse (212121001001012), we get a palindrome (422221101122224).

The spelling of 210100100121212 in words is "two hundred ten trillion, one hundred billion, one hundred million, one hundred twenty-one thousand, two hundred twelve".