21122212039 has 2 divisors, whose sum is σ = 21122212040. Its totient is φ = 21122212038.

The previous prime is 21122211991. The next prime is 21122212043. The reversal of 21122212039 is 93021222112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122212039 - 2¹¹ = 21122209991 is a prime.

It is a super-2 number, since 2×21122212039² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122215039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561106019 + 10561106020.

It is an arithmetic number, because the mean of its divisors is an integer number (10561106020).

Almost surely, 2^21122212039 is an apocalyptic number.

21122212039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122212039 is an equidigital number, since it uses as much as digits as its factorization.

21122212039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21122212039 in words is "twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, thirty-nine".