201031123021 has 8 divisors (see below), whose sum is σ = 204837898464. Its totient is φ = 197224856400.

The previous prime is 201031123019. The next prime is 201031123061. The reversal of 201031123021 is 120321130102.

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 201031123021 - 2¹ = 201031123019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201031122986 and 201031123004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201031123001) 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, 723846 + ... + 962296.

It is an arithmetic number, because the mean of its divisors is an integer number (25604737308).

Almost surely, 2^201031123021 is an apocalyptic number.

It is an amenable number.

201031123021 is a deficient number, since it is larger than the sum of its proper divisors (3806775443).

201031123021 is a wasteful number, since it uses less digits than its factorization.

201031123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254411.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201031123021 its reverse (120321130102), we get a palindrome (321352253123).

The spelling of 201031123021 in words is "two hundred one billion, thirty-one million, one hundred twenty-three thousand, twenty-one".