201042021251 has 2 divisors, whose sum is σ = 201042021252. Its totient is φ = 201042021250.

The previous prime is 201042021227. The next prime is 201042021259. The reversal of 201042021251 is 152120240102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201042021251 - 2¹⁰ = 201042020227 is a prime.

It is not a weakly prime, because it can be changed into another prime (201042021259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100521010625 + 100521010626.

It is an arithmetic number, because the mean of its divisors is an integer number (100521010626).

Almost surely, 2^201042021251 is an apocalyptic number.

201042021251 is a deficient number, since it is larger than the sum of its proper divisors (1).

201042021251 is an equidigital number, since it uses as much as digits as its factorization.

201042021251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 201042021251 its reverse (152120240102), we get a palindrome (353162261353).

The spelling of 201042021251 in words is "two hundred one billion, forty-two million, twenty-one thousand, two hundred fifty-one".