1303231201021 has 4 divisors (see below), whose sum is σ = 1315883931232. Its totient is φ = 1290578470812.

The previous prime is 1303231201009. The next prime is 1303231201031. The reversal of 1303231201021 is 1201021323031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1303231201021 - 2²³ = 1303222812413 is a prime.

It is a super-2 number, since 2×1303231201021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1303231201021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303231201001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6326364951 + ... + 6326365156.

It is an arithmetic number, because the mean of its divisors is an integer number (328970982808).

Almost surely, 2^{1303231201021} is an apocalyptic number.

It is an amenable number.

1303231201021 is a deficient number, since it is larger than the sum of its proper divisors (12652730211).

1303231201021 is a wasteful number, since it uses less digits than its factorization.

1303231201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12652730210.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1303231201021 its reverse (1201021323031), we get a palindrome (2504252524052).

The spelling of 1303231201021 in words is "one trillion, three hundred three billion, two hundred thirty-one million, two hundred one thousand, twenty-one".