201421031 has 16 divisors (see below), whose sum is σ = 233928000. Its totient is φ = 169870848.

The previous prime is 201421019. The next prime is 201421057. The reversal of 201421031 is 130124102.

It is not a de Polignac number, because 201421031 - 2¹⁸ = 201158887 is a prime.

It is a super-2 number, since 2×201421031² = 81140863458205922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201420997 and 201421015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201421531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117005 + ... + 118713.

It is an arithmetic number, because the mean of its divisors is an integer number (14620500).

Almost surely, 2^201421031 is an apocalyptic number.

201421031 is a deficient number, since it is larger than the sum of its proper divisors (32506969).

201421031 is a wasteful number, since it uses less digits than its factorization.

201421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201421031 is about 14192.2877296086. The cubic root of 201421031 is about 586.1853201723.

Adding to 201421031 its reverse (130124102), we get a palindrome (331545133).

The spelling of 201421031 in words is "two hundred one million, four hundred twenty-one thousand, thirty-one".