1223021335040 has 160 divisors (see below), whose sum is σ = 2956899496320. Its totient is φ = 485130240000.

The previous prime is 1223021335027. The next prime is 1223021335093. The reversal of 1223021335040 is 405331203221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

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, 254740640 + ... + 254745440.

It is an arithmetic number, because the mean of its divisors is an integer number (18480621852).

Almost surely, 2^{1223021335040} is an apocalyptic number.

1223021335040 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 1223021335040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478449748160).

1223021335040 is an abundant number, since it is smaller than the sum of its proper divisors (1733878161280).

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

1223021335040 is an equidigital number, since it uses as much as digits as its factorization.

1223021335040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5634 (or 5618 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 1223021335040 its reverse (405331203221), we get a palindrome (1628352538261).

The spelling of 1223021335040 in words is "one trillion, two hundred twenty-three billion, twenty-one million, three hundred thirty-five thousand, forty".