121310010001 has 4 divisors (see below), whose sum is σ = 121312647972. Its totient is φ = 121307372032.

The previous prime is 121310009993. The next prime is 121310010037. The reversal of 121310010001 is 100010013121.

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 98907105025 + 22402904976 = 314495^2 + 149676^2 .

It is a cyclic number.

It is not a de Polignac number, because 121310010001 - 2³ = 121310009993 is a prime.

It is a super-2 number, since 2×121310010001² (a number of 23 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 121310010001.

It is not an unprimeable number, because it can be changed into a prime (121310010071) 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, 1248760 + ... + 1342393.

It is an arithmetic number, because the mean of its divisors is an integer number (30328161993).

Almost surely, 2^121310010001 is an apocalyptic number.

It is an amenable number.

121310010001 is a deficient number, since it is larger than the sum of its proper divisors (2637971).

121310010001 is an equidigital number, since it uses as much as digits as its factorization.

121310010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637970.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 121310010001 its reverse (100010013121), we get a palindrome (221320023122).

The spelling of 121310010001 in words is "one hundred twenty-one billion, three hundred ten million, ten thousand, one".