1223140340420 has 12 divisors (see below), whose sum is σ = 2568594714924. Its totient is φ = 489256136160.

The previous prime is 1223140340399. The next prime is 1223140340483. The reversal of 1223140340420 is 240430413221.

It can be written as a sum of positive squares in 2 ways, for example, as 451831329856 + 771309010564 = 672184^2 + 878242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1223140340420.

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, 30578508491 + ... + 30578508530.

It is an arithmetic number, because the mean of its divisors is an integer number (214049559577).

Almost surely, 2^{1223140340420} is an apocalyptic number.

1223140340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223140340420 is an abundant number, since it is smaller than the sum of its proper divisors (1345454374504).

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

1223140340420 is a wasteful number, since it uses less digits than its factorization.

1223140340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61157017030 (or 61157017028 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1223140340420 its reverse (240430413221), we get a palindrome (1463570753641).

The spelling of 1223140340420 in words is "one trillion, two hundred twenty-three billion, one hundred forty million, three hundred forty thousand, four hundred twenty".