231100202000 has 80 divisors (see below), whose sum is σ = 561120132144. Its totient is φ = 92056320000.

The previous prime is 231100201991. The next prime is 231100202023. The reversal of 231100202000 is 202001132.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 70626251536 + 160473950464 = 265756^2 + 400592^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242270 + ... + 721730.

Almost surely, 2^231100202000 is an apocalyptic number.

231100202000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231100202000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280560066072).

231100202000 is an abundant number, since it is smaller than the sum of its proper divisors (330019930144).

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

231100202000 is a wasteful number, since it uses less digits than its factorization.

231100202000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479725 (or 479709 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 231100202000 its reverse (202001132), we get a palindrome (231302203132).

The spelling of 231100202000 in words is "two hundred thirty-one billion, one hundred million, two hundred two thousand".