1281200512026 has 8 divisors (see below), whose sum is σ = 2562401024064. Its totient is φ = 427066837340.

The previous prime is 1281200512021. The next prime is 1281200512049. The reversal of 1281200512026 is 6202150021821.

It is a sphenic number, since it is the product of 3 distinct primes.

1281200512026 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1281200511984 and 1281200512002.

It is not an unprimeable number, because it can be changed into a prime (1281200512021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106766709330 + ... + 106766709341.

It is an arithmetic number, because the mean of its divisors is an integer number (320300128008).

Almost surely, 2^{1281200512026} is an apocalyptic number.

1281200512026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1281200512026 is a wasteful number, since it uses less digits than its factorization.

1281200512026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213533418676.

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 1281200512026 its reverse (6202150021821), we get a palindrome (7483350533847).

The spelling of 1281200512026 in words is "one trillion, two hundred eighty-one billion, two hundred million, five hundred twelve thousand, twenty-six".