1313001223212 has 96 divisors (see below), whose sum is σ = 3530661184512. Its totient is φ = 372010818816.

The previous prime is 1313001223201. The next prime is 1313001223213. The reversal of 1313001223212 is 2123221003131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1313001223213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6534598 + ... + 6732530.

It is an arithmetic number, because the mean of its divisors is an integer number (36777720672).

Almost surely, 2^{1313001223212} is an apocalyptic number.

1313001223212 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 1313001223212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765330592256).

1313001223212 is an abundant number, since it is smaller than the sum of its proper divisors (2217659961300).

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

1313001223212 is a wasteful number, since it uses less digits than its factorization.

1313001223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198607 (or 198605 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1313001223212 its reverse (2123221003131), we get a palindrome (3436222226343).

The spelling of 1313001223212 in words is "one trillion, three hundred thirteen billion, one million, two hundred twenty-three thousand, two hundred twelve".