10001121211203 has 4 divisors (see below), whose sum is σ = 13334828281608. Its totient is φ = 6667414140800.

The previous prime is 10001121211187. The next prime is 10001121211247. The reversal of 10001121211203 is 30211212110001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10001121211203 - 2⁴ = 10001121211187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10001121211703) 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, 1666853535198 + ... + 1666853535203.

It is an arithmetic number, because the mean of its divisors is an integer number (3333707070402).

Almost surely, 2^{10001121211203} is an apocalyptic number.

10001121211203 is a deficient number, since it is larger than the sum of its proper divisors (3333707070405).

10001121211203 is an equidigital number, since it uses as much as digits as its factorization.

10001121211203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333707070404.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 10001121211203 its reverse (30211212110001), we get a palindrome (40212333321204).

The spelling of 10001121211203 in words is "ten trillion, one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred three".