1220212203213 has 4 divisors (see below), whose sum is σ = 1626949604288. Its totient is φ = 813474802140.

The previous prime is 1220212203211. The next prime is 1220212203239. The reversal of 1220212203213 is 3123022120221.

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 1220212203213 - 2¹ = 1220212203211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220212203213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220212203211) 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 3 ways as a sum of consecutive naturals, for example, 203368700533 + ... + 203368700538.

It is an arithmetic number, because the mean of its divisors is an integer number (406737401072).

Almost surely, 2^{1220212203213} is an apocalyptic number.

It is an amenable number.

1220212203213 is a deficient number, since it is larger than the sum of its proper divisors (406737401075).

1220212203213 is an equidigital number, since it uses as much as digits as its factorization.

1220212203213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406737401074.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1220212203213 its reverse (3123022120221), we get a palindrome (4343234323434).

The spelling of 1220212203213 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred three thousand, two hundred thirteen".