1226089781281 has 8 divisors (see below), whose sum is σ = 1252520694144. Its totient is φ = 1199673197520.

The previous prime is 1226089781269. The next prime is 1226089781291. The reversal of 1226089781281 is 1821879806221.

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

It is a cyclic number.

It is not a de Polignac number, because 1226089781281 - 2¹³ = 1226089773089 is a prime.

It is a super-2 number, since 2×1226089781281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1226089781291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3409210 + ... + 3751651.

It is an arithmetic number, because the mean of its divisors is an integer number (156565086768).

Almost surely, 2^{1226089781281} is an apocalyptic number.

It is an amenable number.

1226089781281 is a deficient number, since it is larger than the sum of its proper divisors (26430912863).

1226089781281 is an equidigital number, since it uses as much as digits as its factorization.

1226089781281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164551.

The product of its (nonzero) digits is 1548288, while the sum is 55.

The spelling of 1226089781281 in words is "one trillion, two hundred twenty-six billion, eighty-nine million, seven hundred eighty-one thousand, two hundred eighty-one".