1221324030342 has 32 divisors (see below), whose sum is σ = 2922826740960. Its totient is φ = 375792009120.

The previous prime is 1221324030281. The next prime is 1221324030347. The reversal of 1221324030342 is 2430304231221.

1221324030342 is a `hidden beast` number, since 1 + 2 + 213 + 2 + 403 + 0 + 3 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221324030347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869888209 + ... + 869889612.

It is an arithmetic number, because the mean of its divisors is an integer number (91338335655).

Almost surely, 2^{1221324030342} is an apocalyptic number.

1221324030342 is an abundant number, since it is smaller than the sum of its proper divisors (1701502710618).

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

1221324030342 is a wasteful number, since it uses less digits than its factorization.

1221324030342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739777845 (or 1739777839 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 1221324030342 its reverse (2430304231221), we get a palindrome (3651628261563).

The spelling of 1221324030342 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-four million, thirty thousand, three hundred forty-two".