231021200032 has 144 divisors (see below), whose sum is σ = 562674651840. Its totient is φ = 92829929472.

The previous prime is 231021199987. The next prime is 231021200077. The reversal of 231021200032 is 230002120132.

It is an interprime number because it is at equal distance from previous prime (231021199987) and next prime (231021200077).

It is a super-3 number, since 3×231021200032³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 231021199979 and 231021200015.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2849853 + ... + 2929795.

It is an arithmetic number, because the mean of its divisors is an integer number (3907462860).

Almost surely, 2^231021200032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231021200032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281337325920).

231021200032 is an abundant number, since it is smaller than the sum of its proper divisors (331653451808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231021200032 is a wasteful number, since it uses less digits than its factorization.

231021200032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80083 (or 80068 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 231021200032 its reverse (230002120132), we get a palindrome (461023320164).

The spelling of 231021200032 in words is "two hundred thirty-one billion, twenty-one million, two hundred thousand, thirty-two".