1212102213321 has 4 divisors (see below), whose sum is σ = 1616136284432. Its totient is φ = 808068142212.

The previous prime is 1212102213319. The next prime is 1212102213347. The reversal of 1212102213321 is 1233122012121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1212102213321 - 2¹ = 1212102213319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212102213391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202017035551 + ... + 202017035556.

It is an arithmetic number, because the mean of its divisors is an integer number (404034071108).

Almost surely, 2^{1212102213321} is an apocalyptic number.

It is an amenable number.

1212102213321 is a deficient number, since it is larger than the sum of its proper divisors (404034071111).

1212102213321 is an equidigital number, since it uses as much as digits as its factorization.

1212102213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404034071110.

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

Adding to 1212102213321 its reverse (1233122012121), we get a palindrome (2445224225442).

The spelling of 1212102213321 in words is "one trillion, two hundred twelve billion, one hundred two million, two hundred thirteen thousand, three hundred twenty-one".