121310112001 has 4 divisors (see below), whose sum is σ = 130641659092. Its totient is φ = 111978564912.

The previous prime is 121310111999. The next prime is 121310112013. The reversal of 121310112001 is 100211013121.

It is a happy number.

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 15960532225 + 105349579776 = 126335^2 + 324576^2 .

It is a cyclic number.

It is not a de Polignac number, because 121310112001 - 2¹ = 121310111999 is a prime.

It is a super-2 number, since 2×121310112001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 9331547077 = 121310112001 / (1 + 2 + 1 + 3 + 1 + 0 + 1 + 1 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121310112701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665773526 + ... + 4665773551.

It is an arithmetic number, because the mean of its divisors is an integer number (32660414773).

Almost surely, 2^121310112001 is an apocalyptic number.

It is an amenable number.

121310112001 is a deficient number, since it is larger than the sum of its proper divisors (9331547091).

121310112001 is an equidigital number, since it uses as much as digits as its factorization.

121310112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331547090.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121310112001 its reverse (100211013121), we get a palindrome (221521125122).

The spelling of 121310112001 in words is "one hundred twenty-one billion, three hundred ten million, one hundred twelve thousand, one".