201420021 has 8 divisors (see below), whose sum is σ = 292974624. Its totient is φ = 122072720.

The previous prime is 201420017. The next prime is 201420031. The reversal of 201420021 is 120024102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201420021 - 2² = 201420017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201419979 and 201420006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201420031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3051786 + ... + 3051851.

It is an arithmetic number, because the mean of its divisors is an integer number (36621828).

Almost surely, 2^201420021 is an apocalyptic number.

It is an amenable number.

201420021 is a deficient number, since it is larger than the sum of its proper divisors (91554603).

201420021 is a wasteful number, since it uses less digits than its factorization.

201420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103651.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 201420021 is about 14192.2521468582. The cubic root of 201420021 is about 586.1843403869.

Adding to 201420021 its reverse (120024102), we get a palindrome (321444123).

The spelling of 201420021 in words is "two hundred one million, four hundred twenty thousand, twenty-one".