1321322222220 has 192 divisors, whose sum is σ = 4967432580096. Its totient is φ = 253440414720.

The previous prime is 1321322222219. The next prime is 1321322222261. The reversal of 1321322222220 is 222222231231.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10939959 + ... + 11060078.

It is an arithmetic number, because the mean of its divisors is an integer number (25872044688).

Almost surely, 2^{1321322222220} is an apocalyptic number.

1321322222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321322222220 is an abundant number, since it is smaller than the sum of its proper divisors (3646110357876).

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

1321322222220 is a wasteful number, since it uses less digits than its factorization.

1321322222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22000080 (or 22000078 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1321322222220 its reverse (222222231231), we get a palindrome (1543544453451).

The spelling of 1321322222220 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".