1312220212400 has 60 divisors (see below), whose sum is σ = 3153654840672. Its totient is φ = 524713969920.

The previous prime is 1312220212367. The next prime is 1312220212411. The reversal of 1312220212400 is 42120222131.

It is a super-2 number, since 2×1312220212400² (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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 666602 + ... + 1751798.

Almost surely, 2^{1312220212400} is an apocalyptic number.

1312220212400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312220212400 is an abundant number, since it is smaller than the sum of its proper divisors (1841434628272).

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

1312220212400 is a wasteful number, since it uses less digits than its factorization.

1312220212400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088238 (or 1088227 counting only the distinct ones).

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

Adding to 1312220212400 its reverse (42120222131), we get a palindrome (1354340434531).

The spelling of 1312220212400 in words is "one trillion, three hundred twelve billion, two hundred twenty million, two hundred twelve thousand, four hundred".