1220410421456 has 20 divisors (see below), whose sum is σ = 2467351504992. Its totient is φ = 583674549216.

The previous prime is 1220410421393. The next prime is 1220410421471. The reversal of 1220410421456 is 6541240140221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658165966 + ... + 1658166701.

Almost surely, 2^{1220410421456} is an apocalyptic number.

1220410421456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1220410421456 is an abundant number, since it is smaller than the sum of its proper divisors (1246941083536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220410421456 is a wasteful number, since it uses less digits than its factorization.

1220410421456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316332698 (or 3316332692 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 1220410421456 its reverse (6541240140221), we get a palindrome (7761650561677).

The spelling of 1220410421456 in words is "one trillion, two hundred twenty billion, four hundred ten million, four hundred twenty-one thousand, four hundred fifty-six".