10203121001 has 16 divisors (see below), whose sum is σ = 10530259200. Its totient is φ = 9881359488.

The previous prime is 10203120971. The next prime is 10203121021. The reversal of 10203121001 is 10012130201.

It is a cyclic number.

It is not a de Polignac number, because 10203121001 - 2⁶ = 10203120937 is a prime.

It is a super-2 number, since 2×10203121001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10203121021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3484400 + ... + 3487326.

It is an arithmetic number, because the mean of its divisors is an integer number (658141200).

Almost surely, 2^10203121001 is an apocalyptic number.

It is an amenable number.

10203121001 is a deficient number, since it is larger than the sum of its proper divisors (327138199).

10203121001 is an equidigital number, since it uses as much as digits as its factorization.

10203121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10203121001 its reverse (10012130201), we get a palindrome (20215251202).

The spelling of 10203121001 in words is "ten billion, two hundred three million, one hundred twenty-one thousand, one".