1012001002042 has 4 divisors (see below), whose sum is σ = 1518001503066. Its totient is φ = 506000501020.

The previous prime is 1012001002007. The next prime is 1012001002043. The reversal of 1012001002042 is 2402001002101.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 687624051361 + 324376950681 = 829231^2 + 569541^2 .

It is not an unprimeable number, because it can be changed into a prime (1012001002043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253000250509 + ... + 253000250512.

Almost surely, 2^{1012001002042} is an apocalyptic number.

1012001002042 is a deficient number, since it is larger than the sum of its proper divisors (506000501024).

1012001002042 is an equidigital number, since it uses as much as digits as its factorization.

1012001002042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506000501023.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1012001002042 its reverse (2402001002101), we get a palindrome (3414002004143).

The spelling of 1012001002042 in words is "one trillion, twelve billion, one million, two thousand, forty-two".