1042121222015 has 4 divisors (see below), whose sum is σ = 1250545466424. Its totient is φ = 833696977608.

The previous prime is 1042121221991. The next prime is 1042121222053. The reversal of 1042121222015 is 5102221212401.

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

It is a cyclic number.

It is not a de Polignac number, because 1042121222015 - 2⁸ = 1042121221759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104212122197 + ... + 104212122206.

It is an arithmetic number, because the mean of its divisors is an integer number (312636366606).

Almost surely, 2^{1042121222015} is an apocalyptic number.

1042121222015 is a deficient number, since it is larger than the sum of its proper divisors (208424244409).

1042121222015 is an equidigital number, since it uses as much as digits as its factorization.

1042121222015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208424244408.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 1042121222015 its reverse (5102221212401), we get a palindrome (6144342434416).

The spelling of 1042121222015 in words is "one trillion, forty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, fifteen".