1321223301040 has 160 divisors (see below), whose sum is σ = 3170719918080. Its totient is φ = 511711506432.

The previous prime is 1321223301023. The next prime is 1321223301043. The reversal of 1321223301040 is 401033221231.

It is a super-2 number, since 2×1321223301040² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321223301043) 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, 207507937 + ... + 207514303.

It is an arithmetic number, because the mean of its divisors is an integer number (19816999488).

Almost surely, 2^{1321223301040} is an apocalyptic number.

1321223301040 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 1321223301040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585359959040).

1321223301040 is an abundant number, since it is smaller than the sum of its proper divisors (1849496617040).

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

1321223301040 is a wasteful number, since it uses less digits than its factorization.

1321223301040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6939 (or 6933 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1321223301040 its reverse (401033221231), we get a palindrome (1722256522271).

The spelling of 1321223301040 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-three million, three hundred one thousand, forty".