1221040425045 has 32 divisors (see below), whose sum is σ = 2263345396992. Its totient is φ = 550543468032.

The previous prime is 1221040425037. The next prime is 1221040425049. The reversal of 1221040425045 is 5405240401221.

It is not a de Polignac number, because 1221040425045 - 2³ = 1221040425037 is a prime.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 79642722 + ... + 79658051.

It is an arithmetic number, because the mean of its divisors is an integer number (70729543656).

Almost surely, 2^{1221040425045} is an apocalyptic number.

1221040425045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221040425045 is a deficient number, since it is larger than the sum of its proper divisors (1042304971947).

1221040425045 is a wasteful number, since it uses less digits than its factorization.

1221040425045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159300861.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 1221040425045 its reverse (5405240401221), we get a palindrome (6626280826266).

The spelling of 1221040425045 in words is "one trillion, two hundred twenty-one billion, forty million, four hundred twenty-five thousand, forty-five".