21020032332281 has 2 divisors, whose sum is σ = 21020032332282. Its totient is φ = 21020032332280.

The previous prime is 21020032332269. The next prime is 21020032332283. The reversal of 21020032332281 is 18223323002012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16020966864400 + 4999065467881 = 4002620^2 + 2235859^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020032332281 - 2¹⁸ = 21020032070137 is a prime.

It is a super-2 number, since 2×21020032332281² (a number of 27 digits) contains 22 as substring.

Together with 21020032332283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21020032332283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510016166140 + 10510016166141.

It is an arithmetic number, because the mean of its divisors is an integer number (10510016166141).

Almost surely, 2^{21020032332281} is an apocalyptic number.

It is an amenable number.

21020032332281 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020032332281 is an equidigital number, since it uses as much as digits as its factorization.

21020032332281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21020032332281 its reverse (18223323002012), we get a palindrome (39243355334293).

The spelling of 21020032332281 in words is "twenty-one trillion, twenty billion, thirty-two million, three hundred thirty-two thousand, two hundred eighty-one".