21114232021 has 2 divisors, whose sum is σ = 21114232022. Its totient is φ = 21114232020.

The previous prime is 21114231959. The next prime is 21114232031. The reversal of 21114232021 is 12023241112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17646199921 + 3468032100 = 132839^2 + 58890^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114232021 - 2¹⁹ = 21113707733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21114232021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114232031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557116010 + 10557116011.

It is an arithmetic number, because the mean of its divisors is an integer number (10557116011).

Almost surely, 2^21114232021 is an apocalyptic number.

It is an amenable number.

21114232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114232021 is an equidigital number, since it uses as much as digits as its factorization.

21114232021 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 21114232021 its reverse (12023241112), we get a palindrome (33137473133).

Subtracting from 21114232021 its reverse (12023241112), we obtain a palindrome (9090990909).

The spelling of 21114232021 in words is "twenty-one billion, one hundred fourteen million, two hundred thirty-two thousand, twenty-one".