21112132333021 has 2 divisors, whose sum is σ = 21112132333022. Its totient is φ = 21112132333020.

The previous prime is 21112132332953. The next prime is 21112132333079. The reversal of 21112132333021 is 12033323121112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21063969202500 + 48163130521 = 4589550^2 + 219461^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112132333021 - 2¹⁷ = 21112132201949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112132333321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556066166510 + 10556066166511.

It is an arithmetic number, because the mean of its divisors is an integer number (10556066166511).

Almost surely, 2^{21112132333021} is an apocalyptic number.

It is an amenable number.

21112132333021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112132333021 is an equidigital number, since it uses as much as digits as its factorization.

21112132333021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21112132333021 its reverse (12033323121112), we get a palindrome (33145455454133).

The spelling of 21112132333021 in words is "twenty-one trillion, one hundred twelve billion, one hundred thirty-two million, three hundred thirty-three thousand, twenty-one".