1221244210212 has 96 divisors (see below), whose sum is σ = 3152651884032. Its totient is φ = 365501984256.

The previous prime is 1221244210181. The next prime is 1221244210253. The reversal of 1221244210212 is 2120124421221.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20362533 + ... + 20422419.

It is an arithmetic number, because the mean of its divisors is an integer number (32840123792).

Almost surely, 2^{1221244210212} is an apocalyptic number.

1221244210212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221244210212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576325942016).

1221244210212 is an abundant number, since it is smaller than the sum of its proper divisors (1931407673820).

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

1221244210212 is a wasteful number, since it uses less digits than its factorization.

1221244210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63477 (or 63475 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 1221244210212 its reverse (2120124421221), we get a palindrome (3341368631433).

The spelling of 1221244210212 in words is "one trillion, two hundred twenty-one billion, two hundred forty-four million, two hundred ten thousand, two hundred twelve".