321203100121212 has 48 divisors (see below), whose sum is σ = 749632234377600. Its totient is φ = 107045082055488.

The previous prime is 321203100121153. The next prime is 321203100121219. The reversal of 321203100121212 is 212121001302123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321203100121219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4030162539 + ... + 4030242237.

It is an arithmetic number, because the mean of its divisors is an integer number (15617338216200).

Almost surely, 2^{321203100121212} is an apocalyptic number.

It is an amenable number.

321203100121212 is an abundant number, since it is smaller than the sum of its proper divisors (428429134256388).

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

321203100121212 is a wasteful number, since it uses less digits than its factorization.

321203100121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146442 (or 146440 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 321203100121212 its reverse (212121001302123), we get a palindrome (533324101423335).

The spelling of 321203100121212 in words is "three hundred twenty-one trillion, two hundred three billion, one hundred million, one hundred twenty-one thousand, two hundred twelve".