1302021113231 has 4 divisors (see below), whose sum is σ = 1304986993200. Its totient is φ = 1299055233264.

The previous prime is 1302021113207. The next prime is 1302021113287. The reversal of 1302021113231 is 1323111202031.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1302021113231 is a prime.

It is a super-2 number, since 2×1302021113231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302021113431) 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 3 ways as a sum of consecutive naturals, for example, 1482939326 + ... + 1482940203.

It is an arithmetic number, because the mean of its divisors is an integer number (326246748300).

Almost surely, 2^{1302021113231} is an apocalyptic number.

1302021113231 is a deficient number, since it is larger than the sum of its proper divisors (2965879969).

1302021113231 is an equidigital number, since it uses as much as digits as its factorization.

1302021113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965879968.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1302021113231 its reverse (1323111202031), we get a palindrome (2625132315262).

The spelling of 1302021113231 in words is "one trillion, three hundred two billion, twenty-one million, one hundred thirteen thousand, two hundred thirty-one".