1423221243420 has 24 divisors (see below), whose sum is σ = 3985019481744. Its totient is φ = 379525664896.

The previous prime is 1423221243403. The next prime is 1423221243443. The reversal of 1423221243420 is 243421223241.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11860176969 + ... + 11860177088.

It is an arithmetic number, because the mean of its divisors is an integer number (166042478406).

Almost surely, 2^{1423221243420} is an apocalyptic number.

1423221243420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423221243420 is an abundant number, since it is smaller than the sum of its proper divisors (2561798238324).

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

1423221243420 is a wasteful number, since it uses less digits than its factorization.

1423221243420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23720354069 (or 23720354067 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 1423221243420 its reverse (243421223241), we get a palindrome (1666642466661).

The spelling of 1423221243420 in words is "one trillion, four hundred twenty-three billion, two hundred twenty-one million, two hundred forty-three thousand, four hundred twenty".