1226920821927 has 8 divisors (see below), whose sum is σ = 1636083170160. Its totient is φ = 817852844160.

The previous prime is 1226920821911. The next prime is 1226920821967. The reversal of 1226920821927 is 7291280296221.

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

It is not a de Polignac number, because 1226920821927 - 2⁴ = 1226920821911 is a prime.

It is a super-3 number, since 3×1226920821927³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1226920821927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226920821967) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23562274 + ... + 23614287.

It is an arithmetic number, because the mean of its divisors is an integer number (204510396270).

Almost surely, 2^{1226920821927} is an apocalyptic number.

1226920821927 is a deficient number, since it is larger than the sum of its proper divisors (409162348233).

1226920821927 is an equidigital number, since it uses as much as digits as its factorization.

1226920821927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47185233.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 1226920821927 in words is "one trillion, two hundred twenty-six billion, nine hundred twenty million, eight hundred twenty-one thousand, nine hundred twenty-seven".