12021430055142 has 32 divisors (see below), whose sum is σ = 24393932282880. Its totient is φ = 3948826040640.

The previous prime is 12021430055137. The next prime is 12021430055227. The reversal of 12021430055142 is 24155003412021.

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, 24092458 + ... + 24586365.

It is an arithmetic number, because the mean of its divisors is an integer number (762310383840).

Almost surely, 2^{12021430055142} is an apocalyptic number.

12021430055142 is an abundant number, since it is smaller than the sum of its proper divisors (12372502227738).

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

12021430055142 is a wasteful number, since it uses less digits than its factorization.

12021430055142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48679428.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 12021430055142 its reverse (24155003412021), we get a palindrome (36176433467163).

The spelling of 12021430055142 in words is "twelve trillion, twenty-one billion, four hundred thirty million, fifty-five thousand, one hundred forty-two".