1212000121001 has 8 divisors (see below), whose sum is σ = 1241823618504. Its totient is φ = 1182189124480.

The previous prime is 1212000120979. The next prime is 1212000121019. The reversal of 1212000121001 is 1001210002121.

It can be written as a sum of positive squares in 4 ways, for example, as 37995365776 + 1174004755225 = 194924^2 + 1083515^2 .

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-1212000121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212000121021) 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 7 ways as a sum of consecutive naturals, for example, 2928806 + ... + 3316911.

It is an arithmetic number, because the mean of its divisors is an integer number (155227952313).

Almost surely, 2^{1212000121001} is an apocalyptic number.

It is an amenable number.

1212000121001 is a deficient number, since it is larger than the sum of its proper divisors (29823497503).

1212000121001 is an equidigital number, since it uses as much as digits as its factorization.

1212000121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6250491.

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

Adding to 1212000121001 its reverse (1001210002121), we get a palindrome (2213210123122).

The spelling of 1212000121001 in words is "one trillion, two hundred twelve billion, one hundred twenty-one thousand, one".