21220021102039 has 2 divisors, whose sum is σ = 21220021102040. Its totient is φ = 21220021102038.

The previous prime is 21220021102001. The next prime is 21220021102057. The reversal of 21220021102039 is 93020112002212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220021102039 - 2²¹ = 21220019004887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220021100039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610010551019 + 10610010551020.

It is an arithmetic number, because the mean of its divisors is an integer number (10610010551020).

Almost surely, 2^{21220021102039} is an apocalyptic number.

21220021102039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220021102039 is an equidigital number, since it uses as much as digits as its factorization.

21220021102039 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 21220021102039 in words is "twenty-one trillion, two hundred twenty billion, twenty-one million, one hundred two thousand, thirty-nine".