1220421104431 has 16 divisors (see below), whose sum is σ = 1240806600000. Its totient is φ = 1200188537856.

The previous prime is 1220421104363. The next prime is 1220421104437. The reversal of 1220421104431 is 1344011240221.

It is a cyclic number.

It is not a de Polignac number, because 1220421104431 - 2³⁷ = 1082982150959 is a prime.

It is a super-2 number, since 2×1220421104431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220421104396 and 1220421104405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220421104437) 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, 52572355 + ... + 52595563.

It is an arithmetic number, because the mean of its divisors is an integer number (77550412500).

Almost surely, 2^{1220421104431} is an apocalyptic number.

1220421104431 is a deficient number, since it is larger than the sum of its proper divisors (20385495569).

1220421104431 is a wasteful number, since it uses less digits than its factorization.

1220421104431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26466.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1220421104431 its reverse (1344011240221), we get a palindrome (2564432344652).

The spelling of 1220421104431 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, one hundred four thousand, four hundred thirty-one".