200021002501 has 2 divisors, whose sum is σ = 200021002502. Its totient is φ = 200021002500.

The previous prime is 200021002459. The next prime is 200021002507. The reversal of 200021002501 is 105200120002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145824696900 + 54196305601 = 381870^2 + 232801^2 .

It is a cyclic number.

It is not a de Polignac number, because 200021002501 - 2²¹ = 200018905349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200021002507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010501250 + 100010501251.

It is an arithmetic number, because the mean of its divisors is an integer number (100010501251).

Almost surely, 2^200021002501 is an apocalyptic number.

It is an amenable number.

200021002501 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021002501 is an equidigital number, since it uses as much as digits as its factorization.

200021002501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 200021002501 its reverse (105200120002), we get a palindrome (305221122503).

It can be divided in two parts, 20002 and 1002501, that multiplied together give a palindrome (20052025002).

The spelling of 200021002501 in words is "two hundred billion, twenty-one million, two thousand, five hundred one".