1312001021242 has 16 divisors (see below), whose sum is σ = 1972420035840. Its totient is φ = 654528107392.

The previous prime is 1312001021239. The next prime is 1312001021273. The reversal of 1312001021242 is 2421201002131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6183018 + ... + 6391690.

It is an arithmetic number, because the mean of its divisors is an integer number (123276252240).

Almost surely, 2^{1312001021242} is an apocalyptic number.

1312001021242 is a deficient number, since it is larger than the sum of its proper divisors (660419014598).

1312001021242 is a wasteful number, since it uses less digits than its factorization.

1312001021242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215717.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1312001021242 its reverse (2421201002131), we get a palindrome (3733202023373).

The spelling of 1312001021242 in words is "one trillion, three hundred twelve billion, one million, twenty-one thousand, two hundred forty-two".