142100450243221 has 4 divisors (see below), whose sum is σ = 142372152825472. Its totient is φ = 141828747660972.

The previous prime is 142100450243207. The next prime is 142100450243233. The reversal of 142100450243221 is 122342054001241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142100450243221 - 2¹⁹ = 142100449718933 is a prime.

It is a super-2 number, since 2×142100450243221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142100450243251) 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, 135851290341 + ... + 135851291386.

It is an arithmetic number, because the mean of its divisors is an integer number (35593038206368).

Almost surely, 2^{142100450243221} is an apocalyptic number.

It is an amenable number.

142100450243221 is a deficient number, since it is larger than the sum of its proper divisors (271702582251).

142100450243221 is an equidigital number, since it uses as much as digits as its factorization.

142100450243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271702582250.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 142100450243221 in words is "one hundred forty-two trillion, one hundred billion, four hundred fifty million, two hundred forty-three thousand, two hundred twenty-one".