21004203132231 has 8 divisors (see below), whose sum is σ = 30551568192384. Its totient is φ = 12729820080120.

The previous prime is 21004203132191. The next prime is 21004203132251. The reversal of 21004203132231 is 13223130240012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21004203132231 - 2²⁵ = 21004169577799 is a prime.

It is a super-2 number, since 2×21004203132231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004203132251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318245501971 + ... + 318245502036.

It is an arithmetic number, because the mean of its divisors is an integer number (3818946024048).

Almost surely, 2^{21004203132231} is an apocalyptic number.

21004203132231 is a deficient number, since it is larger than the sum of its proper divisors (9547365060153).

21004203132231 is a wasteful number, since it uses less digits than its factorization.

21004203132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636491004021.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21004203132231 its reverse (13223130240012), we get a palindrome (34227333372243).

The spelling of 21004203132231 in words is "twenty-one trillion, four billion, two hundred three million, one hundred thirty-two thousand, two hundred thirty-one".