1231221010301 has 4 divisors (see below), whose sum is σ = 1248087051612. Its totient is φ = 1214354968992.

The previous prime is 1231221010267. The next prime is 1231221010309. The reversal of 1231221010301 is 1030101221321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 379670398276 + 851550612025 = 616174^2 + 922795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231221010301 is a prime.

It is a super-2 number, since 2×1231221010301² (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 1231221010301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231221010309) 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, 8433020546 + ... + 8433020691.

It is an arithmetic number, because the mean of its divisors is an integer number (312021762903).

Almost surely, 2^{1231221010301} is an apocalyptic number.

It is an amenable number.

1231221010301 is a deficient number, since it is larger than the sum of its proper divisors (16866041311).

1231221010301 is an equidigital number, since it uses as much as digits as its factorization.

1231221010301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16866041310.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1231221010301 its reverse (1030101221321), we get a palindrome (2261322231622).

The spelling of 1231221010301 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, ten thousand, three hundred one".