1312202142021 has 8 divisors (see below), whose sum is σ = 1749608342944. Its totient is φ = 874798684560.

The previous prime is 1312202142019. The next prime is 1312202142059. The reversal of 1312202142021 is 1202412022131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312202142021 - 2¹ = 1312202142019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312202642021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078770 + ... + 1946316.

It is an arithmetic number, because the mean of its divisors is an integer number (218701042868).

Almost surely, 2^{1312202142021} is an apocalyptic number.

It is an amenable number.

1312202142021 is a deficient number, since it is larger than the sum of its proper divisors (437406200923).

1312202142021 is an equidigital number, since it uses as much as digits as its factorization.

1312202142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371731.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1312202142021 its reverse (1202412022131), we get a palindrome (2514614164152).

The spelling of 1312202142021 in words is "one trillion, three hundred twelve billion, two hundred two million, one hundred forty-two thousand, twenty-one".