21020220110039 has 2 divisors, whose sum is σ = 21020220110040. Its totient is φ = 21020220110038.

The previous prime is 21020220109997. The next prime is 21020220110137. The reversal of 21020220110039 is 93001102202012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020220110039 - 2³⁶ = 20951500633303 is a prime.

It is a super-3 number, since 3×21020220110039³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020220109996 and 21020220110023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020220140039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510110055019 + 10510110055020.

It is an arithmetic number, because the mean of its divisors is an integer number (10510110055020).

Almost surely, 2^{21020220110039} is an apocalyptic number.

21020220110039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020220110039 is an equidigital number, since it uses as much as digits as its factorization.

21020220110039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 21020220110039 in words is "twenty-one trillion, twenty billion, two hundred twenty million, one hundred ten thousand, thirty-nine".