1234456545221 has 8 divisors (see below), whose sum is σ = 1238279673600. Its totient is φ = 1230635553840.

The previous prime is 1234456545211. The next prime is 1234456545247. The reversal of 1234456545221 is 1225456544321.

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 1234456545221 - 2³⁴ = 1217276676037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234456545211) 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, 626756 + ... + 1691666.

It is an arithmetic number, because the mean of its divisors is an integer number (154784959200).

Almost surely, 2^{1234456545221} is an apocalyptic number.

It is an amenable number.

1234456545221 is a deficient number, since it is larger than the sum of its proper divisors (3823128379).

1234456545221 is a wasteful number, since it uses less digits than its factorization.

1234456545221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068499.

The product of its digits is 1152000, while the sum is 44.

It can be divided in two parts, 123445 and 6545221, that added together give a palindrome (6668666).

The spelling of 1234456545221 in words is "one trillion, two hundred thirty-four billion, four hundred fifty-six million, five hundred forty-five thousand, two hundred twenty-one".