203012100221123 has 2 divisors, whose sum is σ = 203012100221124. Its totient is φ = 203012100221122.

The previous prime is 203012100221113. The next prime is 203012100221173. The reversal of 203012100221123 is 321122001210302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203012100221123 - 2¹⁰ = 203012100220099 is a prime.

It is a super-2 number, since 2×203012100221123² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 203012100221095 and 203012100221104.

It is not a weakly prime, because it can be changed into another prime (203012100221113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101506050110561 + 101506050110562.

It is an arithmetic number, because the mean of its divisors is an integer number (101506050110562).

Almost surely, 2^{203012100221123} is an apocalyptic number.

203012100221123 is a deficient number, since it is larger than the sum of its proper divisors (1).

203012100221123 is an equidigital number, since it uses as much as digits as its factorization.

203012100221123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 203012100221123 its reverse (321122001210302), we get a palindrome (524134101431425).

The spelling of 203012100221123 in words is "two hundred three trillion, twelve billion, one hundred million, two hundred twenty-one thousand, one hundred twenty-three".