142421561213421 has 16 divisors (see below), whose sum is σ = 217707947570304. Its totient is φ = 81127018190784.

The previous prime is 142421561213413. The next prime is 142421561213423. The reversal of 142421561213421 is 124312165124241.

It is a happy number.

It is not a de Polignac number, because 142421561213421 - 2³ = 142421561213413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142421561213421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142421561213423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10697121270 + ... + 10697134583.

It is an arithmetic number, because the mean of its divisors is an integer number (13606746723144).

Almost surely, 2^{142421561213421} is an apocalyptic number.

It is an amenable number.

142421561213421 is a deficient number, since it is larger than the sum of its proper divisors (75286386356883).

142421561213421 is a wasteful number, since it uses less digits than its factorization.

142421561213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21394256180.

The product of its digits is 92160, while the sum is 39.

The spelling of 142421561213421 in words is "one hundred forty-two trillion, four hundred twenty-one billion, five hundred sixty-one million, two hundred thirteen thousand, four hundred twenty-one".