20100001212001 has 16 divisors (see below), whose sum is σ = 21468800908800. Its totient is φ = 18776536732800.

The previous prime is 20100001211987. The next prime is 20100001212023. The reversal of 20100001212001 is 10021210000102.

It is a cyclic number.

It is not a de Polignac number, because 20100001212001 - 2²¹ = 20099999114849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20100001212701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1324341 + ... + 6477181.

It is an arithmetic number, because the mean of its divisors is an integer number (1341800056800).

Almost surely, 2^{20100001212001} is an apocalyptic number.

It is an amenable number.

20100001212001 is a deficient number, since it is larger than the sum of its proper divisors (1368799696799).

20100001212001 is a wasteful number, since it uses less digits than its factorization.

20100001212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157240.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20100001212001 its reverse (10021210000102), we get a palindrome (30121211212103).

The spelling of 20100001212001 in words is "twenty trillion, one hundred billion, one million, two hundred twelve thousand, one".