203254856299021 has 2 divisors, whose sum is σ = 203254856299022. Its totient is φ = 203254856299020.

The previous prime is 203254856299007. The next prime is 203254856299111. The reversal of 203254856299021 is 120992658452302.

203254856299021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195913601523396 + 7341254775625 = 13996914^2 + 2709475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203254856299021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203254856299721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101627428149510 + 101627428149511.

It is an arithmetic number, because the mean of its divisors is an integer number (101627428149511).

Almost surely, 2^{203254856299021} is an apocalyptic number.

It is an amenable number.

203254856299021 is a deficient number, since it is larger than the sum of its proper divisors (1).

203254856299021 is an equidigital number, since it uses as much as digits as its factorization.

203254856299021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 203254856299021 in words is "two hundred three trillion, two hundred fifty-four billion, eight hundred fifty-six million, two hundred ninety-nine thousand, twenty-one".