20103012121001 has 4 divisors (see below), whose sum is σ = 20111825368404. Its totient is φ = 20094198873600.

The previous prime is 20103012120953. The next prime is 20103012121009. The reversal of 20103012121001 is 10012121030102.

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 13445972265625 + 6657039855376 = 3666875^2 + 2580124^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103012121001 - 2³⁴ = 20085832251817 is a prime.

It is a super-2 number, since 2×20103012121001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20103012121009) 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, 4406620280 + ... + 4406624841.

It is an arithmetic number, because the mean of its divisors is an integer number (5027956342101).

Almost surely, 2^{20103012121001} is an apocalyptic number.

It is an amenable number.

20103012121001 is a deficient number, since it is larger than the sum of its proper divisors (8813247403).

20103012121001 is an equidigital number, since it uses as much as digits as its factorization.

20103012121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8813247402.

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

Adding to 20103012121001 its reverse (10012121030102), we get a palindrome (30115133151103).

The spelling of 20103012121001 in words is "twenty trillion, one hundred three billion, twelve million, one hundred twenty-one thousand, one".