201030212521 has 2 divisors, whose sum is σ = 201030212522. Its totient is φ = 201030212520.

The previous prime is 201030212501. The next prime is 201030212533. The reversal of 201030212521 is 125212030102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118569346921 + 82460865600 = 344339^2 + 287160^2 .

It is a cyclic number.

It is not a de Polignac number, because 201030212521 - 2⁷ = 201030212393 is a prime.

It is not a weakly prime, because it can be changed into another prime (201030212501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100515106260 + 100515106261.

It is an arithmetic number, because the mean of its divisors is an integer number (100515106261).

Almost surely, 2^201030212521 is an apocalyptic number.

It is an amenable number.

201030212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

201030212521 is an equidigital number, since it uses as much as digits as its factorization.

201030212521 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 201030212521 its reverse (125212030102), we get a palindrome (326242242623).

The spelling of 201030212521 in words is "two hundred one billion, thirty million, two hundred twelve thousand, five hundred twenty-one".