201431021 has 8 divisors (see below), whose sum is σ = 219979584. Its totient is φ = 182921920.

The previous prime is 201430981. The next prime is 201431029. The reversal of 201431021 is 120134102.

201431021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 201431021 - 2¹⁰ = 201429997 is a prime.

It is a super-2 number, since 2×201431021² = 81148912442204882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201430987 and 201431005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201431029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (27497448).

Almost surely, 2^201431021 is an apocalyptic number.

It is an amenable number.

201431021 is a deficient number, since it is larger than the sum of its proper divisors (18548563).

201431021 is a wasteful number, since it uses less digits than its factorization.

201431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19731.

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

The square root of 201431021 is about 14192.6396769593. The cubic root of 201431021 is about 586.1950111407.

Adding to 201431021 its reverse (120134102), we get a palindrome (321565123).

The spelling of 201431021 in words is "two hundred one million, four hundred thirty-one thousand, twenty-one".