1221320404230 has 64 divisors (see below), whose sum is σ = 2960649232128. Its totient is φ = 322410857600.

The previous prime is 1221320404229. The next prime is 1221320404303. The reversal of 1221320404230 is 324040231221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221320404230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22112629 + ... + 22167791.

It is an arithmetic number, because the mean of its divisors is an integer number (46260144252).

Almost surely, 2^{1221320404230} is an apocalyptic number.

1221320404230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221320404230 is an abundant number, since it is smaller than the sum of its proper divisors (1739328827898).

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

1221320404230 is a wasteful number, since it uses less digits than its factorization.

1221320404230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62581.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1221320404230 its reverse (324040231221), we get a palindrome (1545360635451).

The spelling of 1221320404230 in words is "one trillion, two hundred twenty-one billion, three hundred twenty million, four hundred four thousand, two hundred thirty".