21213011100231 has 6 divisors (see below), whose sum is σ = 30641016033680. Its totient is φ = 14142007400148.

The previous prime is 21213011100209. The next prime is 21213011100251. The reversal of 21213011100231 is 13200111031212.

21213011100231 is a `hidden beast` number, since 2 + 1 + 21 + 301 + 110 + 0 + 231 = 666.

It is not a de Polignac number, because 21213011100231 - 2¹⁹ = 21213010575943 is a prime.

It is a super-2 number, since 2×21213011100231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213011100251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1178500616671 + ... + 1178500616688.

Almost surely, 2^{21213011100231} is an apocalyptic number.

21213011100231 is a deficient number, since it is larger than the sum of its proper divisors (9428004933449).

21213011100231 is a wasteful number, since it uses less digits than its factorization.

21213011100231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357001233365 (or 2357001233362 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21213011100231 its reverse (13200111031212), we get a palindrome (34413122131443).

The spelling of 21213011100231 in words is "twenty-one trillion, two hundred thirteen billion, eleven million, one hundred thousand, two hundred thirty-one".