1001121120203 has 4 divisors (see below), whose sum is σ = 1060010597880. Its totient is φ = 942231642528.

The previous prime is 1001121120191. The next prime is 1001121120217. The reversal of 1001121120203 is 3020211211001.

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 1001121120203 - 2¹⁴ = 1001121103819 is a prime.

It is a super-2 number, since 2×1001121120203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001121120283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29444738813 + ... + 29444738846.

It is an arithmetic number, because the mean of its divisors is an integer number (265002649470).

Almost surely, 2^{1001121120203} is an apocalyptic number.

1001121120203 is a deficient number, since it is larger than the sum of its proper divisors (58889477677).

1001121120203 is an equidigital number, since it uses as much as digits as its factorization.

1001121120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58889477676.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1001121120203 its reverse (3020211211001), we get a palindrome (4021332331204).

The spelling of 1001121120203 in words is "one trillion, one billion, one hundred twenty-one million, one hundred twenty thousand, two hundred three".