233131033100021 has 32 divisors (see below), whose sum is σ = 275093024489472. Its totient is φ = 193391105912640.

The previous prime is 233131033099973. The next prime is 233131033100051. The reversal of 233131033100021 is 120001330131332.

233131033100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233131033100021 is a prime.

It is a super-2 number, since 2×233131033100021² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 233131033100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131033100051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 584870630 + ... + 585269096.

It is an arithmetic number, because the mean of its divisors is an integer number (8596657015296).

Almost surely, 2^{233131033100021} is an apocalyptic number.

It is an amenable number.

233131033100021 is a deficient number, since it is larger than the sum of its proper divisors (41961991389451).

233131033100021 is a wasteful number, since it uses less digits than its factorization.

233131033100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410529.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 233131033100021 its reverse (120001330131332), we get a palindrome (353132363231353).

The spelling of 233131033100021 in words is "two hundred thirty-three trillion, one hundred thirty-one billion, thirty-three million, one hundred thousand, twenty-one".