1221040425037 has 2 divisors, whose sum is σ = 1221040425038. Its totient is φ = 1221040425036.

The previous prime is 1221040424987. The next prime is 1221040425049. The reversal of 1221040425037 is 7305240401221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1151401965156 + 69638459881 = 1073034^2 + 263891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221040425037 - 2¹⁵ = 1221040392269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221040425097) 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 as a sum of consecutive naturals, namely, 610520212518 + 610520212519.

It is an arithmetic number, because the mean of its divisors is an integer number (610520212519).

Almost surely, 2^{1221040425037} is an apocalyptic number.

It is an amenable number.

1221040425037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221040425037 is an equidigital number, since it uses as much as digits as its factorization.

1221040425037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 1221040425037 its reverse (7305240401221), we get a palindrome (8526280826258).

The spelling of 1221040425037 in words is "one trillion, two hundred twenty-one billion, forty million, four hundred twenty-five thousand, thirty-seven".