201421240003 has 4 divisors (see below), whose sum is σ = 203415509808. Its totient is φ = 199426970200.

The previous prime is 201421239947. The next prime is 201421240021. The reversal of 201421240003 is 300042124102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201421240003 - 2⁹ = 201421239491 is a prime.

It is a super-2 number, since 2×201421240003² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201421240073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997134751 + ... + 997134952.

It is an arithmetic number, because the mean of its divisors is an integer number (50853877452).

Almost surely, 2^201421240003 is an apocalyptic number.

201421240003 is a deficient number, since it is larger than the sum of its proper divisors (1994269805).

201421240003 is a wasteful number, since it uses less digits than its factorization.

201421240003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994269804.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 201421240003 its reverse (300042124102), we get a palindrome (501463364105).

The spelling of 201421240003 in words is "two hundred one billion, four hundred twenty-one million, two hundred forty thousand, three".