201004421 has 2 divisors, whose sum is σ = 201004422. Its totient is φ = 201004420.

The previous prime is 201004417. The next prime is 201004457. The reversal of 201004421 is 124400102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151019521 + 49984900 = 12289^2 + 7070^2 .

It is a cyclic number.

It is not a de Polignac number, because 201004421 - 2² = 201004417 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 201004396 and 201004405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201004411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100502210 + 100502211.

It is an arithmetic number, because the mean of its divisors is an integer number (100502211).

Almost surely, 2^201004421 is an apocalyptic number.

It is an amenable number.

201004421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201004421 is an equidigital number, since it uses as much as digits as its factorization.

201004421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 201004421 is about 14177.6027945489. The cubic root of 201004421 is about 585.7808949572.

Adding to 201004421 its reverse (124400102), we get a palindrome (325404523).

The spelling of 201004421 in words is "two hundred one million, four thousand, four hundred twenty-one".