1213220004420 has 48 divisors (see below), whose sum is σ = 3447717755328. Its totient is φ = 318696597120.

The previous prime is 1213220004419. The next prime is 1213220004433. The reversal of 1213220004420 is 244000223121.

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, 150893991 + ... + 150902030.

It is an arithmetic number, because the mean of its divisors is an integer number (71827453236).

Almost surely, 2^{1213220004420} is an apocalyptic number.

1213220004420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213220004420 is an abundant number, since it is smaller than the sum of its proper divisors (2234497750908).

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

1213220004420 is a wasteful number, since it uses less digits than its factorization.

1213220004420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301796100 (or 301796098 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1213220004420 its reverse (244000223121), we get a palindrome (1457220227541).

The spelling of 1213220004420 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, four thousand, four hundred twenty".