1221023432342 has 48 divisors (see below), whose sum is σ = 2150710269840. Its totient is φ = 518349585600.

The previous prime is 1221023432341. The next prime is 1221023432351. The reversal of 1221023432342 is 2432343201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221023432341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43686092 + ... + 43714032.

It is an arithmetic number, because the mean of its divisors is an integer number (44806463955).

Almost surely, 2^{1221023432342} is an apocalyptic number.

1221023432342 is a deficient number, since it is larger than the sum of its proper divisors (929686837498).

1221023432342 is a wasteful number, since it uses less digits than its factorization.

1221023432342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32157 (or 32150 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 1221023432342 its reverse (2432343201221), we get a palindrome (3653366633563).

The spelling of 1221023432342 in words is "one trillion, two hundred twenty-one billion, twenty-three million, four hundred thirty-two thousand, three hundred forty-two".