21021212200231 has 2 divisors, whose sum is σ = 21021212200232. Its totient is φ = 21021212200230.

The previous prime is 21021212200187. The next prime is 21021212200243. The reversal of 21021212200231 is 13200221212012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21021212200231 - 2⁹ = 21021212199719 is a prime.

It is a super-2 number, since 2×21021212200231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021212200199 and 21021212200208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021212200031) 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 as a sum of consecutive naturals, namely, 10510606100115 + 10510606100116.

It is an arithmetic number, because the mean of its divisors is an integer number (10510606100116).

Almost surely, 2^{21021212200231} is an apocalyptic number.

21021212200231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021212200231 is an equidigital number, since it uses as much as digits as its factorization.

21021212200231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21021212200231 its reverse (13200221212012), we get a palindrome (34221433412243).

The spelling of 21021212200231 in words is "twenty-one trillion, twenty-one billion, two hundred twelve million, two hundred thousand, two hundred thirty-one".