1221040425035 has 16 divisors (see below), whose sum is σ = 1552369341600. Its totient is φ = 918820655616.

The previous prime is 1221040424987. The next prime is 1221040425037. The reversal of 1221040425035 is 5305240401221.

It is a cyclic number.

It is not a de Polignac number, because 1221040425035 - 2¹² = 1221040420939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221040424989 and 1221040425007.

It is not an unprimeable number, because it can be changed into a prime (1221040425037) 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 15 ways as a sum of consecutive naturals, for example, 4161665 + ... + 4445394.

It is an arithmetic number, because the mean of its divisors is an integer number (97023083850).

Almost surely, 2^{1221040425035} is an apocalyptic number.

1221040425035 is a deficient number, since it is larger than the sum of its proper divisors (331328916565).

1221040425035 is a wasteful number, since it uses less digits than its factorization.

1221040425035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8608750.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 1221040425035 its reverse (5305240401221), we get a palindrome (6526280826256).

The spelling of 1221040425035 in words is "one trillion, two hundred twenty-one billion, forty million, four hundred twenty-five thousand, thirty-five".