1221022142342 has 32 divisors (see below), whose sum is σ = 1901480029344. Its totient is φ = 587638368000.

The previous prime is 1221022142323. The next prime is 1221022142381. The reversal of 1221022142342 is 2432412201221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2083328 + ... + 2604284.

It is an arithmetic number, because the mean of its divisors is an integer number (59421250917).

Almost surely, 2^{1221022142342} is an apocalyptic number.

1221022142342 is a deficient number, since it is larger than the sum of its proper divisors (680457887002).

1221022142342 is a wasteful number, since it uses less digits than its factorization.

1221022142342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521384.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1221022142342 its reverse (2432412201221), we get a palindrome (3653434343563).

The spelling of 1221022142342 in words is "one trillion, two hundred twenty-one billion, twenty-two million, one hundred forty-two thousand, three hundred forty-two".