1313221222000 has 80 divisors (see below), whose sum is σ = 3177075118464. Its totient is φ = 525006240000.

The previous prime is 1313221221973. The next prime is 1313221222063. The reversal of 1313221222000 is 2221223131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1313221222000² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3566530 + ... + 3917470.

Almost surely, 2^{1313221222000} is an apocalyptic number.

1313221222000 is a gapful number since it is divisible by the number (10) 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 1313221222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588537559232).

1313221222000 is an abundant number, since it is smaller than the sum of its proper divisors (1863853896464).

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

1313221222000 is a wasteful number, since it uses less digits than its factorization.

1313221222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352835 (or 352819 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1313221222000 its reverse (2221223131), we get a palindrome (1315442445131).

The spelling of 1313221222000 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, two hundred twenty-two thousand".