1221040425043 has 8 divisors (see below), whose sum is σ = 1233679442912. Its totient is φ = 1208402447616.

The previous prime is 1221040425037. The next prime is 1221040425049. The reversal of 1221040425043 is 3405240401221.

It is an interprime number because it is at equal distance from previous prime (1221040425037) and next prime (1221040425049).

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 1221040425043 - 2¹⁷ = 1221040293971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221040425049) 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, 2221021 + ... + 2715697.

It is an arithmetic number, because the mean of its divisors is an integer number (154209930364).

Almost surely, 2^{1221040425043} is an apocalyptic number.

1221040425043 is a deficient number, since it is larger than the sum of its proper divisors (12639017869).

1221040425043 is an equidigital number, since it uses as much as digits as its factorization.

1221040425043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520221.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 1221040425043 its reverse (3405240401221), we get a palindrome (4626280826264).

The spelling of 1221040425043 in words is "one trillion, two hundred twenty-one billion, forty million, four hundred twenty-five thousand, forty-three".