1042150355221 has 4 divisors (see below), whose sum is σ = 1042909388172. Its totient is φ = 1041391322272.

The previous prime is 1042150355209. The next prime is 1042150355231. The reversal of 1042150355221 is 1225530512401.

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 914919032196 + 127231323025 = 956514^2 + 356695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042150355221 - 2⁹ = 1042150354709 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 (1042150355201) 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, 379514416 + ... + 379517161.

It is an arithmetic number, because the mean of its divisors is an integer number (260727347043).

Almost surely, 2^{1042150355221} is an apocalyptic number.

It is an amenable number.

1042150355221 is a deficient number, since it is larger than the sum of its proper divisors (759032951).

1042150355221 is an equidigital number, since it uses as much as digits as its factorization.

1042150355221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759032950.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 1042150355221 its reverse (1225530512401), we get a palindrome (2267680867622).

The spelling of 1042150355221 in words is "one trillion, forty-two billion, one hundred fifty million, three hundred fifty-five thousand, two hundred twenty-one".