1220312001440 has 144 divisors (see below), whose sum is σ = 3396132230400. Its totient is φ = 413096366592.

The previous prime is 1220312001431. The next prime is 1220312001451. The reversal of 1220312001440 is 441002130221.

It is a super-2 number, since 2×1220312001440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 365780 + ... + 1604499.

It is an arithmetic number, because the mean of its divisors is an integer number (23584251600).

Almost surely, 2^{1220312001440} is an apocalyptic number.

1220312001440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220312001440 is an abundant number, since it is smaller than the sum of its proper divisors (2175820228960).

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

1220312001440 is a wasteful number, since it uses less digits than its factorization.

1220312001440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970387 (or 1970372 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1220312001440 its reverse (441002130221), we get a palindrome (1661314131661).

The spelling of 1220312001440 in words is "one trillion, two hundred twenty billion, three hundred twelve million, one thousand, four hundred forty".