1220334312421 has 16 divisors (see below), whose sum is σ = 1396281529600. Its totient is φ = 1044790887168.

The previous prime is 1220334312413. The next prime is 1220334312437. The reversal of 1220334312421 is 1242134330221.

It is not a de Polignac number, because 1220334312421 - 2³ = 1220334312413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220334312421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220334312451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60936616 + ... + 60956638.

It is an arithmetic number, because the mean of its divisors is an integer number (87267595600).

Almost surely, 2^{1220334312421} is an apocalyptic number.

It is an amenable number.

1220334312421 is a deficient number, since it is larger than the sum of its proper divisors (175947217179).

1220334312421 is a wasteful number, since it uses less digits than its factorization.

1220334312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29668.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1220334312421 its reverse (1242134330221), we get a palindrome (2462468642642).

The spelling of 1220334312421 in words is "one trillion, two hundred twenty billion, three hundred thirty-four million, three hundred twelve thousand, four hundred twenty-one".