12121000210001 has 8 divisors (see below), whose sum is σ = 12951743345640. Its totient is φ = 11303339643648.

The previous prime is 12121000209979. The next prime is 12121000210043. The reversal of 12121000210001 is 10001200012121.

It can be written as a sum of positive squares in 4 ways, for example, as 1420244227600 + 10700755982401 = 1191740^2 + 3271201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121000210001 is a prime.

It is a super-2 number, since 2×12121000210001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121000210061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3270640406 + ... + 3270644111.

It is an arithmetic number, because the mean of its divisors is an integer number (1618967918205).

Almost surely, 2^{12121000210001} is an apocalyptic number.

It is an amenable number.

12121000210001 is a deficient number, since it is larger than the sum of its proper divisors (830743135639).

12121000210001 is a wasteful number, since it uses less digits than its factorization.

12121000210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541284643.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12121000210001 its reverse (10001200012121), we get a palindrome (22122200222122).

The spelling of 12121000210001 in words is "twelve trillion, one hundred twenty-one billion, two hundred ten thousand, one".