142120401421 has 4 divisors (see below), whose sum is σ = 150480425052. Its totient is φ = 133760377792.

The previous prime is 142120401383. The next prime is 142120401499. The reversal of 142120401421 is 124104021241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122072673321 + 20047728100 = 349389^2 + 141590^2 .

It is a cyclic number.

It is not a de Polignac number, because 142120401421 - 2¹⁵ = 142120368653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142120401392 and 142120401401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142120471421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4180011790 + ... + 4180011823.

It is an arithmetic number, because the mean of its divisors is an integer number (37620106263).

Almost surely, 2^142120401421 is an apocalyptic number.

It is an amenable number.

142120401421 is a deficient number, since it is larger than the sum of its proper divisors (8360023631).

142120401421 is an equidigital number, since it uses as much as digits as its factorization.

142120401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8360023630.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 142120401421 its reverse (124104021241), we get a palindrome (266224422662).

The spelling of 142120401421 in words is "one hundred forty-two billion, one hundred twenty million, four hundred one thousand, four hundred twenty-one".