233312100021 has 144 divisors (see below), whose sum is σ = 473016555648. Its totient is φ = 108853113600.

The previous prime is 233312100019. The next prime is 233312100037. The reversal of 233312100021 is 120001213332.

233312100021 is a `hidden beast` number, since 233 + 312 + 100 + 0 + 21 = 666.

It is not a de Polignac number, because 233312100021 - 2¹ = 233312100019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 233312099967 and 233312100003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233312100001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2283336 + ... + 2383326.

It is an arithmetic number, because the mean of its divisors is an integer number (3284837192).

Almost surely, 2^233312100021 is an apocalyptic number.

233312100021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

233312100021 is an abundant number, since it is smaller than the sum of its proper divisors (239704455627).

233312100021 is a wasteful number, since it uses less digits than its factorization.

233312100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100072 (or 100062 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 233312100021 its reverse (120001213332), we get a palindrome (353313313353).

It can be divided in two parts, 233312 and 100021, that added together give a palindrome (333333).

The spelling of 233312100021 in words is "two hundred thirty-three billion, three hundred twelve million, one hundred thousand, twenty-one".