201231002123021 has 8 divisors (see below), whose sum is σ = 221750084629920. Its totient is φ = 181431887423472.

The previous prime is 201231002122993. The next prime is 201231002123023. The reversal of 201231002123021 is 120321200132102.

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 201231002123021 - 2²⁶ = 201230935014157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231002122984 and 201231002123002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201231002123023) 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, 179991951251 + ... + 179991952368.

It is an arithmetic number, because the mean of its divisors is an integer number (27718760578740).

Almost surely, 2^{201231002123021} is an apocalyptic number.

It is an amenable number.

201231002123021 is a deficient number, since it is larger than the sum of its proper divisors (20519082506899).

201231002123021 is a wasteful number, since it uses less digits than its factorization.

201231002123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359983903675.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 201231002123021 its reverse (120321200132102), we get a palindrome (321552202255123).

The spelling of 201231002123021 in words is "two hundred one trillion, two hundred thirty-one billion, two million, one hundred twenty-three thousand, twenty-one".