1220421110435 has 32 divisors (see below), whose sum is σ = 1510881914880. Its totient is φ = 945850445568.

The previous prime is 1220421110429. The next prime is 1220421110449. The reversal of 1220421110435 is 5340111240221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220421110435 - 2¹² = 1220421106339 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58638311 + ... + 58659119.

It is an arithmetic number, because the mean of its divisors is an integer number (47215059840).

Almost surely, 2^{1220421110435} is an apocalyptic number.

1220421110435 is a deficient number, since it is larger than the sum of its proper divisors (290460804445).

1220421110435 is a wasteful number, since it uses less digits than its factorization.

1220421110435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23387.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1220421110435 its reverse (5340111240221), we get a palindrome (6560532350656).

The spelling of 1220421110435 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, one hundred ten thousand, four hundred thirty-five".