21121112002231 has 2 divisors, whose sum is σ = 21121112002232. Its totient is φ = 21121112002230.

The previous prime is 21121112002141. The next prime is 21121112002253. The reversal of 21121112002231 is 13220021112112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21121112002231 - 2¹⁷ = 21121111871159 is a prime.

It is a super-2 number, since 2×21121112002231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121112002199 and 21121112002208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121112002271) 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, 10560556001115 + 10560556001116.

It is an arithmetic number, because the mean of its divisors is an integer number (10560556001116).

Almost surely, 2^{21121112002231} is an apocalyptic number.

21121112002231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121112002231 is an equidigital number, since it uses as much as digits as its factorization.

21121112002231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21121112002231 its reverse (13220021112112), we get a palindrome (34341133114343).

The spelling of 21121112002231 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twelve million, two thousand, two hundred thirty-one".