203010230030021 has 2 divisors, whose sum is σ = 203010230030022. Its totient is φ = 203010230030020.

The previous prime is 203010230029991. The next prime is 203010230030039. The reversal of 203010230030021 is 120030032010302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132995926852996 + 70014303177025 = 11532386^2 + 8367455^2 .

It is a cyclic number.

It is not a de Polignac number, because 203010230030021 - 2³⁴ = 202993050160837 is a prime.

It is a super-2 number, since 2×203010230030021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203010239030021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101505115015010 + 101505115015011.

It is an arithmetic number, because the mean of its divisors is an integer number (101505115015011).

Almost surely, 2^{203010230030021} is an apocalyptic number.

It is an amenable number.

203010230030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

203010230030021 is an equidigital number, since it uses as much as digits as its factorization.

203010230030021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 203010230030021 its reverse (120030032010302), we get a palindrome (323040262040323).

The spelling of 203010230030021 in words is "two hundred three trillion, ten billion, two hundred thirty million, thirty thousand, twenty-one".