1213002221312 has 216 divisors, whose sum is σ = 2902433315040. Its totient is φ = 495328296960.

The previous prime is 1213002221309. The next prime is 1213002221339. The reversal of 1213002221312 is 2131222003121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135845264 + ... + 135854192.

Almost surely, 2^{1213002221312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213002221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451216657520).

1213002221312 is an abundant number, since it is smaller than the sum of its proper divisors (1689431093728).

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

1213002221312 is an frugal number, since it uses more digits than its factorization.

1213002221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9079 (or 9022 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1213002221312 its reverse (2131222003121), we get a palindrome (3344224224433).

The spelling of 1213002221312 in words is "one trillion, two hundred thirteen billion, two million, two hundred twenty-one thousand, three hundred twelve".