210121211212 has 24 divisors (see below), whose sum is σ = 402215969232. Its totient is φ = 95253576000.

The previous prime is 210121211207. The next prime is 210121211213. The reversal of 210121211212 is 212112121012.

210121211212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (210121211213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6385039 + ... + 6417862.

It is an arithmetic number, because the mean of its divisors is an integer number (16758998718).

Almost surely, 2^210121211212 is an apocalyptic number.

210121211212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210121211212 is a deficient number, since it is larger than the sum of its proper divisors (192094758020).

210121211212 is a wasteful number, since it uses less digits than its factorization.

210121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12803289 (or 12803287 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210121211212 its reverse (212112121012), we get a palindrome (422233332224).

The spelling of 210121211212 in words is "two hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".