142451203021 has 4 divisors (see below), whose sum is σ = 147363313500. Its totient is φ = 137539092544.

The previous prime is 142451202979. The next prime is 142451203033. The reversal of 142451203021 is 120302154241.

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 22316176996 + 120135026025 = 149386^2 + 346605^2 .

It is a cyclic number.

It is not a de Polignac number, because 142451203021 - 2¹¹ = 142451200973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142451203091) 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, 2456055196 + ... + 2456055253.

It is an arithmetic number, because the mean of its divisors is an integer number (36840828375).

Almost surely, 2^142451203021 is an apocalyptic number.

It is an amenable number.

142451203021 is a deficient number, since it is larger than the sum of its proper divisors (4912110479).

142451203021 is an equidigital number, since it uses as much as digits as its factorization.

142451203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912110478.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 142451203021 its reverse (120302154241), we get a palindrome (262753357262).

The spelling of 142451203021 in words is "one hundred forty-two billion, four hundred fifty-one million, two hundred three thousand, twenty-one".