231321202002 has 32 divisors (see below), whose sum is σ = 560778672960. Its totient is φ = 70097333760.

The previous prime is 231321201977. The next prime is 231321202003. The reversal of 231321202002 is 200202123132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231321202003) 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, 194714223 + ... + 194715410.

It is an arithmetic number, because the mean of its divisors is an integer number (17524333530).

Almost surely, 2^231321202002 is an apocalyptic number.

231321202002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231321202002 is an abundant number, since it is smaller than the sum of its proper divisors (329457470958).

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

231321202002 is a wasteful number, since it uses less digits than its factorization.

231321202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389429655 (or 389429649 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231321202002 its reverse (200202123132), we get a palindrome (431523325134).

The spelling of 231321202002 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred two thousand, two".