20103252121 has 2 divisors, whose sum is σ = 20103252122. Its totient is φ = 20103252120.

The previous prime is 20103252101. The next prime is 20103252149. The reversal of 20103252121 is 12125230102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18643171600 + 1460080521 = 136540^2 + 38211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103252121 - 2²⁹ = 19566381209 is a prime.

It is a super-3 number, since 3×20103252121³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20103252101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051626060 + 10051626061.

It is an arithmetic number, because the mean of its divisors is an integer number (10051626061).

Almost surely, 2^20103252121 is an apocalyptic number.

It is an amenable number.

20103252121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103252121 is an equidigital number, since it uses as much as digits as its factorization.

20103252121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20103252121 its reverse (12125230102), we get a palindrome (32228482223).

The spelling of 20103252121 in words is "twenty billion, one hundred three million, two hundred fifty-two thousand, one hundred twenty-one".