1220340643226 has 8 divisors (see below), whose sum is σ = 1848634836084. Its totient is φ = 604129031200.

The previous prime is 1220340643219. The next prime is 1220340643259. The reversal of 1220340643226 is 6223460430221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 984062016001 + 236278627225 = 991999^2 + 486085^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020644955 + ... + 3020645358.

Almost surely, 2^{1220340643226} is an apocalyptic number.

1220340643226 is a deficient number, since it is larger than the sum of its proper divisors (628294192858).

1220340643226 is a wasteful number, since it uses less digits than its factorization.

1220340643226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6041290416.

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 1220340643226 in words is "one trillion, two hundred twenty billion, three hundred forty million, six hundred forty-three thousand, two hundred twenty-six".