233121001000 has 32 divisors (see below), whose sum is σ = 545503144680. Its totient is φ = 93248400000.

The previous prime is 233121000977. The next prime is 233121001027. The reversal of 233121001000 is 100121332.

It can be written as a sum of positive squares in 4 ways, for example, as 67343364036 + 165777636964 = 259506^2 + 407158^2 .

It is a super-2 number, since 2×233121001000² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116559501 + ... + 116561500.

Almost surely, 2^233121001000 is an apocalyptic number.

233121001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233121001000 is an abundant number, since it is smaller than the sum of its proper divisors (312382143680).

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

233121001000 is a wasteful number, since it uses less digits than its factorization.

233121001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233121022 (or 233121008 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 233121001000 its reverse (100121332), we get a palindrome (233221122332).

The spelling of 233121001000 in words is "two hundred thirty-three billion, one hundred twenty-one million, one thousand".