142451221333 has 4 divisors (see below), whose sum is σ = 146301254380. Its totient is φ = 138601188288.

The previous prime is 142451221307. The next prime is 142451221337. The reversal of 142451221333 is 333122154241.

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 107464641124 + 34986580209 = 327818^2 + 187047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142451221333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142451221295 and 142451221304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142451221337) 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, 1925016468 + ... + 1925016541.

It is an arithmetic number, because the mean of its divisors is an integer number (36575313595).

Almost surely, 2^142451221333 is an apocalyptic number.

It is an amenable number.

142451221333 is a deficient number, since it is larger than the sum of its proper divisors (3850033047).

142451221333 is an equidigital number, since it uses as much as digits as its factorization.

142451221333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850033046.

The product of its digits is 17280, while the sum is 31.

Adding to 142451221333 its reverse (333122154241), we get a palindrome (475573375574).

The spelling of 142451221333 in words is "one hundred forty-two billion, four hundred fifty-one million, two hundred twenty-one thousand, three hundred thirty-three".