121001212001 has 4 divisors (see below), whose sum is σ = 128118930372. Its totient is φ = 113883493632.

The previous prime is 121001211997. The next prime is 121001212037. The reversal of 121001212001 is 100212100121.

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 108412147600 + 12589064401 = 329260^2 + 112201^2 .

It is a cyclic number.

It is not a de Polignac number, because 121001212001 - 2² = 121001211997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001212301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3558859160 + ... + 3558859193.

It is an arithmetic number, because the mean of its divisors is an integer number (32029732593).

Almost surely, 2^121001212001 is an apocalyptic number.

It is an amenable number.

121001212001 is a deficient number, since it is larger than the sum of its proper divisors (7117718371).

121001212001 is an equidigital number, since it uses as much as digits as its factorization.

121001212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117718370.

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

Adding to 121001212001 its reverse (100212100121), we get a palindrome (221213312122).

The spelling of 121001212001 in words is "one hundred twenty-one billion, one million, two hundred twelve thousand, one".