142242101421251 has 12 divisors (see below), whose sum is σ = 154027758310200. Its totient is φ = 131298451277760.

The previous prime is 142242101421227. The next prime is 142242101421271. The reversal of 142242101421251 is 152124101242241.

It is not a de Polignac number, because 142242101421251 - 2²² = 142242097226947 is a prime.

It is a super-3 number, since 3×142242101421251³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142242101421271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5224871 + ... + 17657391.

It is an arithmetic number, because the mean of its divisors is an integer number (12835646525850).

Almost surely, 2^{142242101421251} is an apocalyptic number.

142242101421251 is a deficient number, since it is larger than the sum of its proper divisors (11785656888949).

142242101421251 is a wasteful number, since it uses less digits than its factorization.

142242101421251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12500246 (or 12500233 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

Adding to 142242101421251 its reverse (152124101242241), we get a palindrome (294366202663492).

The spelling of 142242101421251 in words is "one hundred forty-two trillion, two hundred forty-two billion, one hundred one million, four hundred twenty-one thousand, two hundred fifty-one".