1221410041220 has 48 divisors (see below), whose sum is σ = 2582233976448. Its totient is φ = 485274662400.

The previous prime is 1221410041219. The next prime is 1221410041253. The reversal of 1221410041220 is 221400141221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1221410041192 and 1221410041201.

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, 37724759 + ... + 37757121.

It is an arithmetic number, because the mean of its divisors is an integer number (53796541176).

Almost surely, 2^{1221410041220} is an apocalyptic number.

1221410041220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221410041220 is an abundant number, since it is smaller than the sum of its proper divisors (1360823935228).

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

1221410041220 is a wasteful number, since it uses less digits than its factorization.

1221410041220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45020 (or 45018 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221410041220 its reverse (221400141221), we get a palindrome (1442810182441).

The spelling of 1221410041220 in words is "one trillion, two hundred twenty-one billion, four hundred ten million, forty-one thousand, two hundred twenty".