1220213321212 has 24 divisors (see below), whose sum is σ = 2270016458640. Its totient is φ = 572273049600.

The previous prime is 1220213321177. The next prime is 1220213321221. The reversal of 1220213321212 is 2121233120221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79474693 + ... + 79490044.

It is an arithmetic number, because the mean of its divisors is an integer number (94584019110).

Almost surely, 2^{1220213321212} is an apocalyptic number.

It is an amenable number.

1220213321212 is a deficient number, since it is larger than the sum of its proper divisors (1049803137428).

1220213321212 is a wasteful number, since it uses less digits than its factorization.

1220213321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158964861 (or 158964859 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1220213321212 its reverse (2121233120221), we get a palindrome (3341446441433).

The spelling of 1220213321212 in words is "one trillion, two hundred twenty billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred twelve".