201432766421 has 2 divisors, whose sum is σ = 201432766422. Its totient is φ = 201432766420.

The previous prime is 201432766399. The next prime is 201432766477. The reversal of 201432766421 is 124667234102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187392886321 + 14039880100 = 432889^2 + 118490^2 .

It is a cyclic number.

It is not a de Polignac number, because 201432766421 - 2²² = 201428572117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201432766121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100716383210 + 100716383211.

It is an arithmetic number, because the mean of its divisors is an integer number (100716383211).

Almost surely, 2^201432766421 is an apocalyptic number.

It is an amenable number.

201432766421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201432766421 is an equidigital number, since it uses as much as digits as its factorization.

201432766421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 201432766421 in words is "two hundred one billion, four hundred thirty-two million, seven hundred sixty-six thousand, four hundred twenty-one".