1220432512105 has 16 divisors (see below), whose sum is σ = 1528504254720. Its totient is φ = 933706433088.

The previous prime is 1220432512097. The next prime is 1220432512111. The reversal of 1220432512105 is 5012152340221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220432512105 - 2³ = 1220432512097 is a prime.

It is a super-3 number, since 3×1220432512105³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508365 + ... + 1642954.

It is an arithmetic number, because the mean of its divisors is an integer number (95531515920).

Almost surely, 2^{1220432512105} is an apocalyptic number.

It is an amenable number.

1220432512105 is a deficient number, since it is larger than the sum of its proper divisors (308071742615).

1220432512105 is a wasteful number, since it uses less digits than its factorization.

1220432512105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156280.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1220432512105 its reverse (5012152340221), we get a palindrome (6232584852326).

The spelling of 1220432512105 in words is "one trillion, two hundred twenty billion, four hundred thirty-two million, five hundred twelve thousand, one hundred five".